Three boys and seven girls are asked how much money they have in their pockets. The boys
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Three boys and seven girls are asked how much money they have in their pockets. The boys have $2.50 each and the mean amount that the 10 children have is $3.90.
a. Show that the girls have a total of $31.50.
b. Given that the seven girls have equal amounts of money, find the standard deviation of the amounts that the 10 children have.
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a To find the total amount of money that the girls have we can subtract the total amount of money th...View the full answer
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Related Book For 
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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