railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Elementary Statistics

Find the mean of the following frequency distribution.

x 5 6 15 9 8

f 10 5 8 10 9

1

\( 8\frac{13}{21}\)

2

\(7\frac{13}{21}\)

3

\(9\frac{13}{21}\)

4

\(6\frac{13}{21}\)

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