Question
The average age of a group of 70 students is 14 years.
If three students whose ages are 22years, 20years, ________ years is replaced with three new student whose ages are 19 years, ______ years, and 32 years, then the new average age is increased by 0.4 years. I. 17, 36 II. 22, 41 III. 15, 34Solution
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) + (51-42) = 28 x-y = 19 So, option I, II, and III all satisfy the above relation Hence, all three will be the answer.
ICAR – National Institute of Abiotic Stress management is located at ____
A hermaphrodite flower isÂ
Katte disease of cardamom is transmitted by which insect?
Central Institute of Arid Horticulture was located at
Vertical movement of water in the soil is known as _________.
The major part of soil type found in Madhya Pradesh is:
The average dry matter requirement of desi cow is ____ during dry period and ____ during lactating period.Â
Pebrine is a disease of B. mori:
What is the term for the process of converting atmospheric nitrogen gas into a form that plants can absorb?
According to Lindeman’s law how much energy is lost while transfer from one to next trophic level ?
Relevant for Exams:
