Question
Average 20 numbers is ‘x’. If the average of first
12 numbers is 64.5 while average of last 5 numbers is 86.6 and 13th, 14th and 15th numbers are (2x - 42), (x + 50) and 162 respectively. Find the 14th number.Solution
According to question, => 20x = 64.5 × 12 + 86.6 × 5 + 2x – 42 + x + 50 + 162 => 17x = 1377 => x = 81 Therefore, 14th number = 81 + 50 = 131
More Average Questions
(799.81/64) ÷ (10/799.92) × (129.84/130) = ?
...23.98% of 624.99 = 19.98% of ? + 14.98% of 639.99
124.80 + 50.01 + √170 = ? ÷ 5
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
350 ÷ 5 + 30 % of 180 + ? * 12 = 48 * √16
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
12.99 × 9.99 + ? × 7 + 240.001 = 21.012Â
? + 96.18 – 15.02 = 118.98 + 31.09
244.98% of 189.98% of 599.99 + 199.98 = ?
Relevant for Exams:
