Question

How 9p-7.5p becomes 1.5p

Answer 1

Answer:

because 9 - 7.5 = 1.5 and p is already multiplied with 1.5 ....

Answer 2

Answer:

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Step-by-step explanation:

Given:✔

Mean = 7.5

xi - 3 | 5 | 7 | 9| 11| 13 |

fi - 6 | 8 | 15 | p| 8 | 4 |

fixi- 18 | 40 | 105 | 9p | 88 | 52|

Σfi = 41+p

Σfixi = 303+9p

Mean = Σfixi / Σfi

7.5 = (303+9p) / (41 +p)

7.5(41 +p) = 303 +9p

307.5 +7.5 p = 303 +9p

307.5 -  303 = 9p - 7.5 p

4.5 = 1.5 p

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p = 4.5 / 1.5 = 3

P = 3

Hence, the value of p is 3.