Question
Maths
March 11, 2020, 10:42 p.m.
Answer
The sum of n terms of three arithmetic progression are S1 ,s2 and s3 respectively. The first term of AP is 1 and their common difference is 1,2 and 3 respectively. Prove that s1 s3= 2s2
limits
Maths
March 11, 2020, 9:08 p.m.
Answer
A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random
from the lot. What is the probability that the bulb is good.
Maths
March 11, 2020, 8:47 p.m.
Answer
A field is 80 m long and 50m wide. A pit 10 m long 7.5 m wide and 8 m deep is dug in one corner of the field and the earth taken out is evenly spread over the remaining part of the field. Find the rise in the level of the field.