Which is the exact mirror image of the following, if the mirror is held vertically?
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Which is the exact mirror image of the following, if the mirror is held vertically?
(Question 6)
Average age of 4 members of a family is 42 years. If the age of Father and Mother are 60 and 50 respectively, then what is the average age of the other two members?
Show answer & explanation
Total age of 4 members = 4 * 42 = 168. Sum of parents' ages = 60 + 50 = 110. Remaining age for the other 2 members = 168 - 110 = 58. Their average is 58 / 2 = 29 years.
Step-by-step Derivation:
Step 1: Total age of 4 members = 4 * 42 = 168 years.
Step 2: Sum of Father's and Mother's ages = 60 + 50 = 110 years.
Step 3: Total age of other 2 members = 168 - 110 = 58 years.
Step 4: Average age of other 2 members = 58 / 2 = 29 years.