The average of three numbers is 77.The first number is twice the second and the second number is twice the third. Find the first number?
a. 33
b. 66
c. 77
d. 132
e. None of these
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Let 3rd no.be x
Therefore, 2nd no. will be 2x
Therefore,1st no. will be 4x
Now
avg=4x+2x+x/3
77=7x/3
x=33
Therefore 1st no. will be 4×33=132
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