14.Probability
easy

જો $A$ અને $B$ બે ઘટનાઓ છે કે જેમાં $P\,(A) = 0.3$ અને $P\,(A \cup B) = 0.8$. જો $A$ અને  $B$ એ નિરપેક્ષ ઘટનાઓ હોય,તો $P(B) = $

A

$\frac{5}{6}$

B

$\frac{5}{7}$

C

$\frac{3}{5}$

D

$\frac{2}{5}$

(IIT-1990)

Solution

(b) $0.8 = 0.3 + x – 0.3x \Rightarrow x = 5/7.$

Standard 11
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.