The probability that a student will receive A, B, C or D grade or 0.40, 0.3, 0.1 and 0.10 respectively. Find the probability that a student will receive. i.                B or C grade    ii. at most C grade.

Explanation

Let the probability that student receive` A`
grade be `P(A) `

`P(A)=0.40`

`P(B)=0.35`

`P(C)=0.15` and `P(D)=0.10`


(i)
`P` (not on A grade)`=1−P(A) `

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