1 Answers
The result of tossing a fair dice 120 times is summarized above…
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Number | 1 | 2 | 3 | 4 | 5 | 6 |
Frequency | 12 | 20 | x | 21 | x – 1 | 28 |
The result of tossing a fair dice 120 times is summarized above. Find the value of x
A. 20
B. 22
C. 21
D. 19
QUICK ANSWER…
A
DETAILS…
We you can safely deduct from the question is that total frequency = 120, hence:
12 + 20 + x + 21 + x – 1 + 28 = 120
80 + 2x = 120
2x = 120 – 80
2x = 40
x = 40/2 = 20
Now for the right answer to the above question:
- Option A is correct.
- Option B is incorrect.
- C is incorrect.
- D is not the correct answer.
KEY-POINTS…
You may please note these/this:
- Only the frequency is used here because that is only what we need to do our calculation.
- The number of times the dice was tossed is referred to as the frequency.
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/ culled from 2020 JAMB-UTME mathematics past question 36 /