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The grades obtained by 30 students of cl...

The grades obtained by 30 students of class VII are as follows : `A^(+) , B^(+) , A, B, A^(+) , B^(+), B, B ,B^(+) , A , A, A^(+) , B, B^(+) A, A^(+) , B, B, A, A, A^(+) , A^(+), A^(+), B, B^(+), B, B^(+), A^(+), A^(+), A`
IF a students has been selected at random, then find the probability that he has obtained grade `A^(+)`

A

`(7)/(10)`

B

`(7)/(30)`

C

`(9)/(10)`

D

`(3)/(10)`

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