Question

Here is the information we know about this game:

• There are five red cards numbered, 1, 3, 5, 9 or 12. Each number is used exactly once.
• There are four numbered blue cards, 1, 3, 4 or 5. Each number is used exactly once.
• You withdraw a red card and a blue card. If the product of the two numbers obtained is a perfect square, you have removed a winning pair. What is the probability of drawing a winning pair?

A perfect square is an integer which can be expressed as the product of two identical whole numbers. 25 is a perfect square since it can be expressed as the product 5 × 5 or 5 2.

Answer 1

3/20

15%

0.15

( All answers are the same)

Explanation:

Red cards : 5

Blue cards : 4

4 x 5 = 20

20 different pairs

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1,1

3,3

5,5

3 winning pairs

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the probability of getting a winning pair is 3/20, 15%, 0.15