मुख्य›संघ लोक सेवा आयोग प्रारंभिक परीक्षा›प्रश्न पत्र 2: सामान्य अध्ययन II (CSAT)›सिविल सेवा अभिरुचि परीक्षण (CSAT)›आधारभूत संख्यान एवं आंकड़ों का निर्वचन›A father is nine times as old as his son and the mother is eight

A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the father's and the mother's age is 51 years. What is the age of the son?

20152Mprelimsupscyear-2015p2csatquantitative-abilitylinear-equation
A.7 years
B.5 years
C.4 years
D.3 yearsसही
व्याख्या एवं हल

सही उत्तर: (D) 3 years

Let son's age be x. Father's age = 9x, Mother's age = 8x. Given: 9x + 8x = 51. Therefore 17x = 51. x = 3 years.

In English (Question & Model Answer)

A father is nine times as old as his son and the mother is eight times as old as the son. The sum of the father's and the mother's age is 51 years. What is the age of the son?

A.7 years
B.5 years
C.4 years
D.3 yearsCorrect

Correct Option: (D) 3 years

Let son's age be x. Father's age = 9x, Mother's age = 8x. Given: 9x + 8x = 51. Therefore 17x = 51. x = 3 years.

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