A bag has 6 red balls and 3 white balls. Two balls are drawn one after another without replacement. Find the probability that both are red.
Answer and explanation
Correct answer: D.
- Step 1: ; then .
- Step 2: Multiply: .
Answer
.
Why not the others: : it treats the draws as replaced. : it counts one red and one white. : it adds instead of multiplying.
Practise more Data Handling.
Free questions with an explanation for every one, and full timed Leaving Cert Ireland mock tests.