He can buy 6 water bottles that are $3 a piece.
Answer:
P(X > 2) = 0.6687
P(2 < X < 5) = 0.4821
Step-by-step explanation:
This is a binomial distribution problem
Binomial distribution function is represented by
P(X = x) = ⁿCₓ pˣ qⁿ⁻ˣ
n = total number of sample spaces = sample size = 10
x = Number of successes required = more than 2, then between 2 and 5.
p = probability of success = probability that a college student will say they use credit cards because of the rewards program = 0.32
q = probability of failure = 1 - 0.32 = 0.68
For more than 2
a) P(X > 2) = 1 - P(X ≤ 2) = 1 - [P(X=0) + P(X=1) + P(X=2)] = 1 - [0.0211392282 + 0.09947872095 + 0.21066082083] = 0.66872123002 = 0.6687
For between 2 and 5 exclusive
P(2 < X < 5) = P(X=3) + P(X=4) = 0.26435867712 + 0.21770714587 = 0.482065823 = 0.4821
Hope this Helps!!!
Answer: 225 minutes
Step-by-step explanation:
so do 5 times 5 ok, 25. then do 45 times 5 then the rate for 25 pages is 225 minutes.
(5x+17)+129+94+(7x-46)+(9x-11)=540
5x+7x+9x+17+129+94-46-11=540
21x+146+94-57=540
21x+240-57=540
21x+183=540
-183 -183
21x=357
/21 /21
x=17
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hope it helps