Question

Keyshawn is bowling in a competition. He has a 26% chance of getting a strike each time he

bowls. What is the probability that Keyshawn doesn't get a strike until after his first five
attempts?
0019
00.22
O 0.78
O 0.85

Answer 1

0.22

Explanation:

Answer 2

0.22 is the probability that Keyshawn doesn't get a strike until after his first five attempts.

Solution:

Given: Chance of getting a strike each time is
`26\%`

To find: The probability that Keyshawn doesn't get a strike until after his first five attempts.

Not striking on
`1^(st)` attempt =
`1-0.26=0.74`

Not striking on
`1^(st)` and
`2^(nd)` attempt =
`0.74*0.74`

Not striking upto
`3^(rd)` attempt =
`0.74*0.74*0.74`

Not striking upto
`4^(th)` attempt =
`0.74*0.74*0.74*0.74`

Not striking upto
`5^(th)` attempt =
`0.74*0.74*0.74*0.74*0.74=0.221900662`