# Stats help with binomial probability distribution question

Anonymous

Question description

Sorry the picture is upside down, I've tried to get it upright to no avail. But:

(a) Are my probabilities (.867, .933, 1) correct?

(b) For 13 or more am I doing the (n,p,x) formula 3 times (for 13, 14, and 15 recognitions?)

(c) If so, 15 is n, the probability goes in x, and then for x is the number just 13, 14, or 15?

In class, we haven't done any charts (x/p(x)) for binom dist, only this (n,p,x) formula on the graphing calc.

Thanks in advance for the help!

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