A grouped data set has the following frequency distribution

MATHEMATICS · Single correct · CBSE · Mathematics · Statistics · Statistics

Problem

A grouped data set has the following frequency distribution. The mean of the data is

40

. Which one of the following equations can be used to calculate the missing frequency

p

? Class interval: 30–40 40–50 50–60 Frequency: 10

p

6 (a)

\dfrac{350 + 45p}{16 + p} = 40

(b)

\dfrac{680 + 45p}{10 + p} = 40

(c)

\dfrac{760 + 50p}{16 + p} = 40

(d)

\dfrac{350 + 45p + 330}{16 + p} = 40