RRB Paramedical Staff Nurse Model Paper 7

Question : 51 of 100

Marks: +1, -0

Three numbers, first is twice the second and second is twice the third. The average of the three numbers is 21. Find the largest number of the three.

Solution:

Let IIIrd number

= x

IInd number

= 2x

Ist number

= 4x

x=3×3=9

Largest number

=4×9=36

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