Question

Emma had 10 Balls in a bag. The balls were numbers 1 through 10. She wanted to test the probability of drawing a ball that is a multiple of 3.

Also, write a prediction about if there is an unlikely, impossible, likely, even, or certain change of drawing a multiple of 3.

Answer 1

• Total balls=10
• Multiples of 3=3,6,9

Total multiples=3

`\\ \sf\longmapsto P(3)=(Multiples\:of\:3)/(Total \:balls)`

`\\ \sf\longmapsto P(3)=(3)/(10)`

`\\ \sf\longmapsto P(3)=30\%`

• It is <50%;

So it is unlikely to happen.

Answer 2

• 30%
• Unlikely

Explanation:

The balls - multiples of 3 are:

• 3, 6 and 9

The probability of a multiple of 3 is:

• 3 out of 10 or
• P = 3/10 = 30%

30% probability is in the range 0%-50% so this event is unlikely