1.

The average age of a group of 20 tourists is 14 years. The age of the only girl member of the group is 2 years less than the average age of the group. If the age of guide is included the average age increases by 2 years. Find the difference between the ages of the guide and the girl member of group?1). 422). 433). 454). 40

Answer»

The average age of 20 tourists = 14 YEARS 

Age of girl member = 14 – 2 = 12 year

New average (INCLUDING guide) = 16 years 

∴ Sum of their ages 

⇒ 20 × 14 + Age of guide = 21 × 16 

∴ Age of guide = 56 Years

DIFFERENCE between the ages of guide and girl member = (56 - 12) = 44



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