Compare the average score of a student at the beginning of a month and at the end of that month, if at first, it increased by 40%, then decr

Question

Compare the average score of a student at the beginning of a month and at the end of that month, if at first, it increased by 40%, then decreased by 25%

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Cora 3 weeks 2021-09-09T16:56:29+00:00 2 Answers 0

Answers ( )

    0
    2021-09-09T16:57:39+00:00

    Answer:

    122.5

    Step-by-step explanation:

    Let the student normal score be 100

    In the beginning score increased by 40%

    Hence score at the beginning =100+40 = 140%

    Now before end score decreased by 25%

    Decrease = 25% of 140 = 35

    Hence score at the end of month = 140-35 = 105

    Average score for the month

    = Total of scores of end and beginning month /2

    = \frac{140+105}{2} \\=122.5

    0
    2021-09-09T16:58:23+00:00

    Answer: 5%

    Step-by-step explanation:

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45:7+7-4:2-5:5*4+35:2 =? ( )