Question
What is the overall average of marks for all the
students if three groups consist of 45, 35, and 40 students with average marks of 40, 60, and 45, respectively?Solution
ATQ,
Required average = (45 × 40 + 35 × 60 + 40 × 45)/(45 + 35 + 40) = 5700/120 = 47.5
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625, 125, 375, 75, 225, 45, ?
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111, 109, 115, ?, 211, -509
What will come in place of the question mark (?) in the following series?
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120, 130, 145, 165, ?, 220
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4, 4, 5, ? , 248, 1248
9 25 ? 121 221 337
...What will come in place of the question mark (?) in the following number series?
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9 14 38 129 ? 2705 16260
...What will come in place of the question mark (?) in the following series?
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