Salary( in Rs) |
Number of Workers |
3000 |
16 |
4000 |
12 |
5000 |
10 |
6000 |
8 |
7000 |
6 |
8000 |
4 |
9000 |
3 |
10000 |
1 |
Total |
60 |
x |
f |
fx |
3000 |
16 |
48000 |
4000 |
12 |
48000 |
5000 |
10 |
50000 |
6000 |
8 |
48000 |
7000 |
6 |
42000 |
8000 |
4 |
32000 |
9000 |
3 |
27000 |
10000 |
1 |
10000 |
sum |
60 |
305000 |
Given below are the links of some of the reference books for class 9 Math.
You can use above books for extra knowledge and practicing different questions.
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