The formula to calculate standard deviation from probability is \sqrt(n*p*(1-p)). n is the sample size, and 200 in this case (number of putts for practice). p is 80% or 0.8, the probability that he can make it. So the standard deviation is \sqrt(200*0.8*(1-0.8)=\sqrt(200*0.8*0.2)=\sqrt(16)=4.
Answer:
D)
Step-by-step explanation:
Answer:
40%
Step-by-step explanation:
40-24=16
16/40 ×100 =40%
So we need have to understand that if we were to solve this, our answer would be 7 less than 'p' with that information we get p-7.
