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Question

Find the values of p, q, r and s in the given cumulative frequency distribution.
xfrequencyCumulative frequency103p=1510q=2025r=257s=30550


A

p = 0, q = 10, r = 35, s = 42

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B

p = 3, q = 13, r = 28, s = 35

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C

p = 3, q = 13, r = 35, s = 42

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D

p = 3, q = 13, r = 38, s = 45

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Solution

The correct option is D

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


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