Question 1166910: 26% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two,
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! this is 10C2*0.26^2*0.74^8 from the binomial probability distribution
=0.2735
or calculator 2nd VARS binomalpdf (10,0.26,2) ENTER
more than 2 is 1 - P(0)-P(1)-P(2)
probability of P(0)=0.74^10=0.0492
P(1)=10*0.26*0.74*9=0.1730
sum of the three negative terms is 0.4957
1=0.4957=0.5043
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