Find the values of p, q, r and s in the given cumulative frequency distribution.
xfrequencyCumulative frequency103p=−−−−1510q=−−−−2025r=−−−−257s=−−−−30550
p = 3, q = 13, r = 38, s = 45
As cumulative frequency is the sum of all previous frequencies up to the current point,
xfrequencyCumulative frequency103p=31510q=10+3=132025r=13+25=38257s=38+7=4530545+5=50