Q)In a market 4 men are standing. The average age of the four before 4years is 45, after some days one man is added and his age is 49. What is the average age of all? a) 43 b)45 c)47 d)49
Sol: Avg 4 yrs ago = 45 so avg now = 49 a person of age 49 is added so avg remains 49
Q)In a shopping mall with a staff of 5 members the average age is 45 years. After 5 years a person joined them and the average age is again 45 years. What‟s the age of 6th person? a) 25 b)20 c)45 d)30
Sol: After 5 years average age becums 50 Total age = 250 new member joins suppose age x so (250 + x) / 6 = 45 x = 20
Q)In a market 4