## anonymous one year ago What is the probability of 2 successes in 4 trials of an experiment if the probability of success of one trial is 0.3?

1. anonymous

.15 because .5*.3=.15

2. anonymous

15%

3. anonymous

dont forget to medal

4. kropot72

The binomial distribution applies to this. Therefore the required probability is given by $\large P(2\ out\ of\ 4)=4C2\times0.3^{2}\times0.7^{2}=0.2646$