Give the standard deviation for the probability distribution. (round to two decimal places)

Firstly .

So work out E[X],
, note we can get rid of the 0 because 0 times anything = 0

Similarly, work out E[X²]
, note we can get rid of the 0 because 0 times anything = 0.

Then Var[X] = 6.75 - 2.15² = 2.1275
By using  you find SD=[X]=1.46

One shot. if 60% of 10 is 6, then what is 70%? we know it would be seven (since 60% is mathematically 60/100, or 6/10, then 70% is 70/100, or 7/10) but we can check anyway using ratios: 6 : 60% = x : 70%*inverse multiplicationx * 60% = 6 * 70%*divide both sides by 60%x = (6 * 70%) / 60%x = 7and since he has made 6 shots already, he would need just one more to get 7 shots or 70%. if the explanation is too confusing, comment and i will try to