Question
The average height of 14 students in a group is (x +
12). If the average of the first seven students is 140 cm and the average of the remaining seven students is 160 cm, find the value of (x + 22).Solution
According to the question, The average height of 14 students = (x + 12) = 14 * (x + 12) The total height of first seven students = 7 * 140 = 980 The total height of last seven students = 7 * 160 = 1120 980 + 1120 = 14 * (x + 12) 2100 = 14(x + 12) 150 = x + 12 x = 138 x + 22 = 160
If  204    196       223   x  284
Then, what is the average of the numbers of the above series?
...0Â Â Â Â Â Â 2 Â Â Â Â Â Â Â 6Â Â Â Â Â Â 12 Â Â Â Â Â Â 20Â Â Â Â Â Â Â ?
...A series is 4, 5, 17, 88, 620, 5585
If another series a, b, 23, d, e, f follows the same pattern as the given number series, then find the approx...
Four terms are in proportion. The first, second and fourth terms are 4, 22, and 33. Find the third term.
7Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 26Â Â Â Â Â Â Â Â Â Â Â 63Â Â Â Â Â Â Â Â Â Â Â 126Â Â Â Â Â Â Â Â Â Â 215Â Â Â Â Â Â 342
...12 11 18 34 89.5 259.5
...9 16 56 318 2424 25070
...13, 14, 18, 27, 43, ?
95     110     128     ?     181      222
...7Â Â Â Â Â Â 15Â Â Â Â Â Â Â 31Â Â Â Â Â Â 63Â Â Â Â Â Â 127Â Â Â Â Â Â ?
...
