Question

4 The mean of the following distribution is 53
3. Fond the value of p.
Tc. I. 0-20 20-40 40-60 60-80 80-100
Frequency 12 15 32 p 13​

Answer 1

53=12+15+32+13+p/4

53=72+p/4

53(4)=72+p

212-72=p

p=140