Question

The mean of the following 33 people is 3 Find 'p'a
9 people score 1 mark
6 people score 2 mark
9 people score 3 marks
3 people score 5 marks
6 people score (p+4) marks​

Answer 1

Step-by-step explanation:

$\frac{(9 \times 1) + (6 \times 2) + (9 \times 3) + (3 \times 5) + (6 \times (p + 4)) }{33} = 3$

$9 + 12 + 27 + 15 + 6p + 24 = 99$

$6p = 99 - 87$

$6p = 12$

$p = \frac{12}{6}$

$p = 2$

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