Question
The average marks in geography exam of a class of 25
students are 64. If the marks of three students were misread as 44, 46 and 61 in lieu of the actual marks 54, 64 and 67 respectively, then find the correct average.Solution
Incorrect total marks= 64x25=1600 Sum of misread marks= 44+46+61 = 151 Sum of actual marks= 54+64+67 = 185 Difference= 185-151= 34 Correct total marks= 1600+34= 1634 Correct average=1634/25 =65.36
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The value of x which satisfies the equation (x+a2+2c2) / (b+c) + (x+b2 +2a2) / (c+a) + (x+c+2b2) ...
Quantity I – 3
Quantity II – 254
If > 0 and < 0
 is equal to:If the nine-digit number 43x1145y2 is divisible by 88, then the value of (3x — 2y), for the smallest value of y, is:
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If x sin3 θ + y cos3 θ = sin θ cos θ and x sin θ − y cos θ = 0, then the value of x2 + y2 equals
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