18 20 men, 10 women and 10 children are in a competition. The mean score for the women is 15.6. The mean score for the chi

Question

18
20 men, 10 women and 10 children are in a competition.
The mean score for the women is 15.6.
The mean score for the children is 9.2.
Kevin says that the mean score for all 40 people is 11.2.
Work out the mean score for the men.

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Yến Oanh 5 years 2021-07-18T09:11:49+00:00 1 Answers 128 views 0

Answers ( )

  1. Euphemia
    -1
    2021-07-18T09:13:10+00:00
    Reply

    Answer:

    20

    Step-by-step explanation:

    The mean score for the women = 15.6

    Sum of score for the women = 15.6*10 = 156

    The mean score for the children = 9.2

    Sum of score for the children = 9.2 * 10 = 92

    The mean score for all 40 people = 11.2

    Sum of the score of 40 people = 11.2 *40 = 448

    Sum of the score for 20 men = 448 – 92 – 156 = 200

    Mean of the score for the men = 200÷ 20 =20

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