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Solutions
25 Videos

How many different sums of money can be made from a $5 bill, a $10 bill, a $20 bill, and a $50 bill?

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0.50mins

Q1

In how many ways could a group of 10 people form a committee with at least 8 people on it?

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0.31mins

Q2

If a set has 12 elements, how many subsets can be formed?

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0.24mins

Q3

A judging panel will have 6 members chosen from 8 teachers and 10 students. There must be at least 3 students on the panel. In how many ways could there be

a) 3 students on the panel?

b) 4 students on the panel?

c) 5 students on the panel?

d) least 3 students on the panel?

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1.16mins

Q4

Identify whether the following situations involve permutations, combinations, or both. Justify your choice.

Forming a committee of 5 people from a group of 12 people

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0.13mins

Q5a

Identify whether the following situations involve permutations, combinations, or both. Justify your choice.

Choosing a president, a vice president, and a treasurer from a committee of 12 members

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0.28mins

Q5b

Identify whether the following situations involve permutations, combinations, or both. Justify your choice.

Choosing 4 men and 4 women to be on a basketball team from among 6 men and 6 women, and assembling the athletes for a team photo

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0.43mins

Q5c

Naming 3 people from among 15 contestants to win 3 different prizes

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Q5d

You receive requests to connect with people every day on your social media account.

If you have 15 requests to be “friends” with people, in how many ways could you respond by either accepting or rejecting each request?

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0.27mins

Q6

Tonya has the following toppings available for her sandwich: lettuce, tomatoes, onions, olives, sprouts, peppers, mustard, and shredded cheese. She can use up to three toppings. How many different sandwiches can Tonya make?

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0.47mins

Q7

Rohan is shopping for new pants. Six' different styles are available. How many different purchases could Rohan make?

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0.37mins

Q8

You can factor the number 210 into prime factors as `2 \times 3 \times 5 \times7`

.The products of prime factors form divisors (e.g., `2 \times 3 = 6`

). Determine the total number of divisors of 210.

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0.28mins

Q9

A board of directors needs to assign a chair, vice-chair, treasurer, secretary, and communications officer. There are four women and six men on the board. There w111' be two women and three men on the executive. In how many ways could this be done?

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0.47mins

Q10

Each player is dealt six cards from a standard deck. In how many ways could a hand contain at least two queens?

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0.46mins

Q11a

In cribbage, each player is dealt six cards from a standard deck. In how many ways could a hand contain

more than three red cards?

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Q11b

In cribbage, each player is dealt six cards from a standard deck. In how many ways could a hand contain

at least two hearts and at least two spades?

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1.54mins

Q11c

A telemarketer will call 12 people from a list of 20 men and 25 women. In how many ways could he select

*a)* 12 men or 12 women?

*b)* 6 men and 6 women?

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0.33mins

Q12

A cabin has two rooms with three single beds each, one room with four single beds, and one room with two single beds.

Six girls and six boys are assigned to rooms with people of the same gender. In how many ways can the rooms be assigned?

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1.44mins

Q13

Six students from each of grades 9 to 12 have been pre—selected to win eight different prizes as students of the month. In how many ways could two students from each grade be selected to win these prizes?

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0.47mins

Q14

Given the numbers -6, -5, -4, -3, -2, -1, 1, 2, 3, 4. 5, in how many ways could four different numbers be chosen so that their product is negative?

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0.49mins

Q15

On a crown and anchor wheel, a crown, an anchor. and the four suits from a deck of cards are displayed in slots around the wheel.

Each three-of—a-kind (e.g., crown, crown, crown) occurs twice. Calculate the number of slots with three-of—a-kind.

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Q16a

On a crown and anchor wheel, a crown, an anchor, and the four suits from a deck of cards are displayed in slots around the wheel.

Determine the number of slots with two-of-a-kind.

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Q16b

On a crown and anchor wheel, a crown, an anchor. and the four suits from a deck of cards are displayed in slots around the wheel.

The following restrictions are in place when all three symbols are different:

- A crown and an anchor do not occur together (e.g., whiz. cannot occur).
- Three different suits do not occur together .
- If a crown occurs with two different suits, an anchor may not also occur with the same two suits, and vice versa

Calculate the number of slots with three different symbols. Use your calculations to verify the total number of slots on the wheel.

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Q16c

There are 10 points in a plane. No three points are collinear. How many convex polygons can be drawn using these points as vertices?

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0.34mins

Q17

Five men and five women are selected from eight men and nine women and then seated around a circular table. In how many ways can this be done if their particular seat at the table does not matter?

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Q18