the mean hight of 20 boys of a class is 150cm when a boy leave the class the mean height comes down by 0.5 cm find the height of the boy
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Answer:
total height of the boys =150 into 20
Step-by-step explanation:
=3000. average height of 19boys(150-0.5cm)
total height of 19boys/19=149.5
total height of 20 boys-height of boys who left/19= 149.5
total height of 20boys-x=149.5 into19
3000-x 2840.5
x=3000-2840.5
x=159.5
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