Question
The average age of a group of 70 students is
14 years. If three students whose ages are 22 years, 20years, ________ years are replaced with three new students whose ages are 19 years, ______ years, and 32 years, then the new average age is increased by 0.4 years. The value given in the option, which of the following will correctly fill the banks. I. 17, 36 II. 22, 41 III. 15, 34ÂSolution
The average age increased by 0.4 years .  So, the difference of sum of ages of new student to the age of old student = 70*0.4 = 28 years  (19+32+__x___) - (20+22+__y_ _) = 28  (x-y) + (51 -4 2 ) = 28  x-y = 19  So, option I, II, and III all satisfy the above relation  Hence, all three will be the answer
Under which defence project is INS Nilgiri constructed?
Who has issued the guidelines on the import of gold by Tariff Rate Quota (TRQ) holders under the India-UAE Comprehensive Economic Partnership Agreement ...
How many Indian languages are supported by the Cell Broadcast Solution for disseminating alerts?
Who is the author of the book titled "Parliament: Powers, Functions & Privileges; A Comparative Constitutional Perspective"?
What is the currency of Bhutan besides the Bhutanese Ngultrum?
Recently the Saifabad Mint Museum has been set up by the Security Printing and Minting Corporation of India Ltd(SPMCIL) in ______ city of Telangana?
In which village of Sindhudurg has Maharashtra inaugurated its first glass skywalk over a waterfall?
Which payments bank has entered into a tie-up with Sequoia Capital-backed fintech Hubble to introduce India’s first spending account?
Which country unveiled the world's largest gold bar weighing 300.12 kg?
What are the two problem statements that the HaRBInger 2024 hackathon is focusing on?
Relevant for Exams:
