SSC MTS 6 Feb 2026 Shift 3 Paper

Concept:Average = sum of all observations ÷ total number of observations. For the first 25 prime numbers, their sum is a known constant: 1060.Explanation:The first 25 prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.Add them in groups: (2+3+5+7+11) = 28, (13+17+19+23+29) = 101, (31+37+41+43+47) = 199, (53+59+61+67+71) = 311, (73+79+83+89+97) = 421.Total sum = 28 + 101 + 199 + 311 + 421 = 1060.Total count = 25.Average = $1060 ÷ 25 = 42.4$.Answer:42.4 (Option B)