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A marble is chosen from marbles numbered...

A marble is chosen from marbles numbered 13 to 22. Find the probability of getting a marble having number 15 or 20 on it.

A

`7/10`

B

`3/10`

C

`2/5`

D

`1/5`

Text Solution

Verified by Experts

The correct Answer is:
D
Here n(E) = 2
and n(S) = 10
`therefore" Required probability " = (2)/(10)=(1)/(5)`
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