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The dynamics of crowd behavior are hard to study because people are not reliable witnesses of their own behavior. Now consider 6 people standing in a que of a super market. You want to predict where behavior based on their age group. You get to know from the super market record that there average age 2 years ago was 41 years. After a while another person joins the queue and the present average age of all the 7 is 39 years. The present age of the last person in queue is.

Read Solution (Total 1)

6 person 2 years ago avg age 41 years
present age of 6 person avg is 43 years
sum of 6 person avg age 43*6=258
after 7 person add sum of avg age is 39*7=273
so 7 th person age is 273-258=15
pls correct if wrong
13 years agoHelpfull: Yes(13) No(1)

TCS Other Question

3 years ago Jacob's age was twice John's age. 3 years hence Jacob's age will be 4/3 times the age of John's. Find Jacob's present age in binary numbers. In China of the tang dynasty unprecedented social kiosks prevailed but yet there was a great mathematician and quote astronomer who reveled in numerical riddles. In his compilation of such puzzles the total numbers of puzzles is equal to the product of the number of the puzzles that classified as easy and extremely difficult. Now if 1/2 of the numbers is 2 more than 1/6 of the same number. What is the number in the binary system?