Question
Average 20 numbers is ‘x’. If the average of first
12 numbers is 74.5 while average of last 5 numbers is 84.8 and 13th, 14th and 15th numbers are (4x - 45), (x + 50) and 183 respectively. Find the 14th number.Solution
According to question, => 20x = 74.5 × 12 + 84.8 × 5 + 4x – 45 + x + 50 + 183 => 15x = 1506 => x = 100.4 Therefore, 14th number = 100.4 + 50 = 150.4
More Average Questions
Find the wrong number in the given number series.
7, 8, 17, 42, 83, 172- Find the wrong number in the given number series.
8, 16, 32, 70, 128, 256 - Find the wrong number, in the given number series.
320, 160, 80, 50, 20, 10 24, 41, 58, 75, 94, 109
32, 46, 88, 158, 256, 380
Find the wrong term in the given series below.
1024, 130, 34.5, 19.25, 21.5, 44.55
19, 20, 39, 59, 98, 156, 255
6, 22, 76, 314, 1580, 9600
72, 36, 54, 135, 470.5, 2126.25Â
- 2024, 1583, 1193, 822, 498, 209