Question

If the probability of guessing a write ans is p/12 and wrong ans is 1/3 find value of p

Answer 1

since the sum of the probability is 1

$\frac{p}{12} + \frac{1}{3} = 1 \\ \frac{p + 4}{12} = 1 \\ p + 4 = 12 \\ p = 8$

hence the value of P is 8