MCQ
Consider the circuit,If the probability that each switch is closed is $p$, then find the probability of current flowing through $AB$


- ✓${p^2} + p$
- B${p^3} + p - 1$
- C${p^3} + p$
- D${p^2} + p + 1$

$\therefore $ Their probability $= p \cdot p = {p^2}$
Now current will flow in lower part of $c$, if $c$ is closed, its probability is $p$.
Thus current will flow from $A$ to $B$ if current flows either in upper part or flow in lower part.
$\therefore$ Required probability $={p^2} + p$.
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$($ કે જ્યાં $det(B)$ એ શ્રેણિક $B$ નો નિશ્ચાયક છે )