Question

20161 8. The table given below shows the age distribution of 1000 persons who visited a marketing centre on a Sunday. Age (in years) 0-10 10-20 20-30 | 30-40 a 40-50 50-60 60-70 Number of 105 222 220 138 102 113 100 persons Find the mean age of the persons visiting the marketing centre on that day. Use step deviation method taking A = 35 and h = 10. [CBSE 2015 HINT​

Answer 1

Answer:

Required mean =A+

∑f

i

∑f

i

u

i

×h =35+ 1000

(−351) ×10=35−3.51

=31.49

Answer 2

Answer is = 31.49

HOPE MY ANSWER WILL BE HELPFUL FOR YOU DEAR :)