Q. 254.5( 2 Votes )

Answer :

**To Find:** Missing frequency(p)

**Concept Used:**

**Explanation:**

Given, mean = 7.68

9p + 303 = 7.68p + 314.88

9P – 7.68P = 314.88 – 303

1.32P = 11.88

p = 9

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