Question

Dewayne missed four of the 30 problems on the problem set. What percent of the problems did Dewayne answer correctly? (answer with a fraction for the remainder)

Answer 1

The percent of the problems did Dewayne answer correctly = 86.6%

Explanation:

Given DeWayne missed four of the 30 problems on the problem set

let "E" be the event of missing problem set P(E) =
`(4)/(30)`

Let
`E^(-)` be the event of DeWayne answer correctly

P(
`E^(-)`) = 1 - p(E)

=
`1- (4)/(30)`

=
`(30-4)/(30)`

=
`(26)/(30)` = 0.866

The percent of the problems did Dewayne answer correctly = 86.6%