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The p.d.f. of a r.v. X is f(x)={{:((1)/(...

The p.d.f. of a r.v. X is `f(x)={{:((1)/(x^(2))","1ltxltoo),(0", otherwise"):}`. If `C_(1)={x : 1lt x lt 2}" and "C_(2)={x : 4lt x lt 5}`, then `P(C_(1)uuC_(2))` =

A

`1/20`

B

`7/20`

C

`11/20`

D

`13/20`

Text Solution

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The correct Answer is:
C
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