Amena2000 Amena2000

25-02-2017
Mathematics

Answered

The arithmetic mean of ten boys is 8 years, 6 months one of them is 13 years old. Then the arithmetic mean of remaining 9 boys is

a)9.5 b) 9 c) 8 d) 7

Verified Answer :

Anonymous Anonymous

25-02-2017

The arithmetic mean of ten boys is 8 years, 6 months = 8.5 years
total age = 10* 8.5 = 85 years

one of them is 13 years
total age of rest = 85 - 13 = 72 years
mean of rest = 72/9 = 8 years

Answer is C) 8 years

Answer Link

Related Questions

help me with this question please

Write a sentence that explains the relationship between the values of the two sevens in 277180

11 5 over 8 into an improper fraction

URGENTHELPNEEDEDWho has used the power of words to better the world in their speech What persuasive techniques did they use and how is it effective

Read the passage And walk among long dappled grass Which choice identifies and interprets the figurative language Yeats uses in this passage A The narrative str

is a method for analyzing and reducing a relational database to its most streamlined form Structured query Normalization Query by example Joining Relational an

7605098689 expanded form

7 In which quadrant does the solution of the system fall x y 4 2x y 2 AI BII CIII DIV

what is the fractional equivalent of 02666

an acute angle 0 is in a right triangle with cos 056 what is the value of sec 0

Web Analytics