RRB Assistant Loco Pilot and Technician Model Paper 17 with key

Question : 37 of 75

Marks: +1, -0

The average age of a group of members is 47 years. A new person having an age of 30 joins the group, taking the total strength of the group to 10 members. Find the new average of the group.

45.3 years
48. 7 years
35.7 years
38.9 years

Validate

Solution:

Initial strength = 9, Average = 47
Total age of 9 members
= 47 × 9 = 423
Total age of 10 members
= 423 + 30 = 453
Average age of 10 members
=

{453}/{10}

= 45.3 years

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