Question
The average weight of a group of (x - 3) employees is (x
+ 4) kg. If a manager of weight 54 kg joins the office, then average weight of the group increased by 1 kg. Find the strength of the group excluding the manager.Solution
ATQ, Total weight of the group = (x - 3) × (x + 4) kg Weight of office manager = 54 kg According to question, {(x - 3)(x + 4) + 54}/{(x – 3) + 1} = (x + 4) + 1 (x - 3)(x + 4) + 54 = (x + 4)(x – 3) + (x – 3) + (x + 4) + 1 54 = 2x + 1 + 1 2x = 54 – 2 x = 52/2 x = 26 So, strength of group = 26 – 3 = 23
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21 _ 51 _ 7 _ 12 _ 75
After interchanging the given two signs, what will be the value of the given equation?
X and –
64 + 15 ÷ 90 - 120 X 17
Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.
16@5@4@2@...
If the ‘-’ and ‘×’ are interchanged, What will be the value of the following equation?
34 × 22 + 192 ÷ 12 – 8
...Which among the given operators should replace the “%” (in the same order) in the given expression below:
5 % 10 % 5 % 36 % 15 % 6
What will be the value of expression if the numbers/digits ‘(30)’ and ‘(13)’ are interchanged?
78 ÷ 30 × 6 + 13 - 14 + 12
...Select the correct combination of mathematical signs that can sequentially replace the sign * and make the equation correct.
3 * 12 * 4 * 5 * 4 * 116
Out of the total number of players, 100/3 % are in hotel X and the remaining are in hotel Y. If 20 players from hotel Y are shifted to hotel X, then the...
Which two signs need to be interchanged to make the following equation correct?
75 – 18 × 80 ÷ 16 + 40 = 125
Select the correct combination of the mathematical signs to replace the ‘@’ symbols in the below equation and thereby balance it:
81@9@5@30@1...
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