Civil Services UPSC EPFO (EO/AO) Mock Test 2023 Mathematics Sequences and Series Arithmetic Progressions
Let p be the mean of m observations and q be the mean of n observations, where p ≤ q. If the combined mean of (m + n) observations is c, then which one of the following is correct?
1
c ≤ p
2
c ≥ q
3
p ≤ c ≤ q
4
q ≤ c ≤ p