Question

On average, 1.7 students using the Bank Islam ATM machine located outside of UMK Jeli Campus during any 30 minutes interval. Find the probability of exactly 3 students using the Bank Islam ATM machine during any 30 minutes interval.

Answer 1

Let $X=$ the number of the defective products produced: $X\sim Po(\lambda t).$

Given $\lambda t=1.7.$

$$P(X=3)=\dfrac{e^{-1.7}(1.7)^{3}}{(3)!}=0.149587$$