Monday, October 16, 2006

Maxine's E-49 Number III Questions

Question 16 -

What is the probability of guessing the correct answer to a multiple choice question if there are 5 choices?

The probability is 20%.
You take the number of outcomes, which is 1 and divide it by the total possible outcomes, which is 5.

1/5 = 0.2 * 100 = 20%

Question 17 -

What is the probability of guessing the correct answer to a true-false question?

With a true-false question there are only 2 answers so that's your total possible outcome and you can only choose 1 so your number of outcomes. So divide them.

1/2 = 0.5 * 100 = 50%

Question 18 -

What is the probability that your birthday will fall on a Saturday or Sunday?

Well there are 7 days in a week so that's your total possible outcome and Saturday and Sunday are only 2 so that's your number of outcomes. So divide them.

2/7 = 0.2857 * 100 = 28.57%

I hope that this makes sense!

Making a Question of my Own -

What is the probability that your birthday will fall on a Wednesday?

So Wednesday is only 1 of the days in the week so that's your number of outcomes and there are 7 days in a week in total so that's your total possible outcomes. So divide them.

1/7 = 0.1428 * 100 = 14.28%. 14.28% is your probability.