Find the probability that a number selected at random from 41…
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Find the probability that a number selected at random from 41 to 56 is a multiple of 9
A. 1/8
B. 2/15
C. 3/16
D. 7/8
QUICK ANSWER…
A
DETAILS…
The probability that a number selected at random from 41 to 56 is a multiple of 9 is = 1/8
Numbers from 41 to 56 = 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, and 56.
Total number occurrence = 16
Numbers that are multiples of 9 (between 41 and 56) = 45, and 54.
Total number of occurrence of the numbers that are multiples of 9 is = 2
Thus, the probability that a number selected at random from 41 to 56 is a multiple of 9 is = 2/16 = 1/8.
Now for the right answer to the above question:
- Option A is correct.
- Option B is not correct.
- C is incorrect.
- D is not the correct answer.
KEY-POINTS…
You may please note these/this:
- Probability = number of required occurrence /number of possible occurrence.
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/ culled from 2021 JAMB-UTME MATHEMATICS question 25 /
