Jambmaths question:
|
Number |
1 |
2 |
3 |
4 |
5 |
6 |
|
Frequency |
12 |
20 |
x |
21 |
x – 1 |
28 |
The result of tossing a fair die 120 times is summarized above. Find the value of x
Option A:
19
Option B:
20
Option C:
21
Option D:
22
Jamb Maths Solution:
$\begin{align} & 12+20+x+21+x-1+28=120 \\ & 80+2x=120 \\ & x=20 \\\end{align}$
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Year of Exam: