Question

solve the que and explain​

Answer 1

Answer:

u should find the mean of it

Step-by-step explanation:

make a table of xi and fi....

xi. fi. fixi

10. 15. 150

15. 18 380

12. 16 192

20. 21. 420

9. 15. 135

now from this find fixi which is by multiplying the xi and fi horizontal way.

then find sum of fi and fixi separately....

so sum of fi is 85. sum of fixi is 1277

now divide €fixi/€fi

which is 1277/85

Answer will be 15.02