1. ## investment probability

an investor holds three different investments,an analyst predicts the probability of profit increases for each company

A: 70%
B: 50%
C: 65%

if the analysts predictions are true,what is the probability that all 3 show profit increase?what is the probability that only one would increase?

2. Originally Posted by dan123
an investor holds three different investments,an analyst predicts the probability of profit increases for each company

A: 70%
B: 50%
C: 65%

if the analysts predictions are true,what is the probability that all 3 show profit increase?what is the probability that only one would increase?
Hi dan,

$P(\text{all 3 profit increases})=(0.70)(0.50)(0.65)$

$P(\text{only 1 would increase})=(0.70)(0.50)(0.35)+(0.30)(0.50)(0.35)+( 0.30)(0.50)(0.65)$