બે ઘટનાઓ A અને B માટે,P,(A cap B) = | vedclass

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Question

Correct options are $A), B)$ and $C)$

$\because P(A \cup B)=P(A)+P(B)-P(A \cap B)$

on rearranging we get

$P(A \cap B)=P(A)+P(B)-P(A \cup B) \

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Vedclass · Answer

Correct options are $A), B)$ and $C)$

$\because P(A \cup B)=P(A)+P(B)-P(A \cap B)$

on rearranging we get

$P(A \cap B)=P(A)+P(B)-P(A \cup B) \quad$ which is option $C$

Also $\because \quad 0 \leq P ( A \cup B ) \leq 1$

$\Rightarrow P(A)+P(B)-1 \leq P(A \cap B) \leq P(A)+P(B)$

Hence $B$ and $C$ are also correct

Now if $P(A \cap B)=P(A)+P(B)+P(A \cap B)$

$\Rightarrow P ( A )+ P ( B )=0$

which is not necessary for the events $A$ and $B$

Hence the correct options are $A, B$ and $C$

બે ઘટનાઓ $A$ અને $B$ માટે,$P\,(A \cap B) = $

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જો $A$ અને $B$ નિરપેક્ષ ઘટનાઓ હોય અને $P(A)=\frac{3}{5}$ અને$P(B)=\frac{1}{5}$ હોય, તો $P(A \cap B)$ શોધો.

ધારો કે $A$ અને $B$ બે નિરપેક્ષ ઘટનાઓ છે. $P(A)\,\, = \,\,\frac{1}{5},\,\,P(A\,\, \cup \,\,B)\,\, = \,\,\frac{7}{{10}}\,$ હોય તો $P(\overline B )$ બરાબર શું થાય ?