q: Resident of town X participated in a survey to determine the number of hours per week each resident spent watching television. The distribution of the results of the survey had a mean of 21 hours and std deviation of 8 hrs. The number of hours that pat, a resident of town X, watched television last week was between 1 and 2 standard deviation below the mean. Which of the following could be the number of hours that Pat watched television last week?
Options:
(A) 30
(B) 20
(C) 18
(D) 12
(E) 6
a: Stream of consciousness: 21-12 < no of hrs < 21-8
9< no of hrs < 13. The answer is (D).
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q: In what time a sum of money double itself at 3% per annum simple interest?
Options:
(A) 33 1/8%
(B) 33 1/3%
(C) 83 1/3%
(D) 33 4/3%
(E) 73 1/3%
a: Stream of consciousness: P = (P*3*R)/100
R = 33 1/3% The answer is (B).
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q: One man selling a lottery there are 10 prizes and 25 no prizes. if a lottery is drawn randomly, What is the probability of getting a prize?
Options:
(A) 1/5
(B) 2/7
(C) 2/9
(D) 3/11
(E) 4/11
a:
Stream of consciousness: P (getting a prize) = 10 = 10 = 2/7
(10 + 25) 35 The answer is (B).
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