Question
The mean of 60 numbers is 105. Calculate the new mean if
all numbers are multiplied by 4.Solution
ATQ,
New average = 105 × 4 = 420
42, 54, 78, 114, 168, 222
What will be come in place of (?) in the given number series.
2, 6, 18, 54, ?, 486The median of the following distribution is:
The ratio of Pawan's income to Qureshi's income is 6:5. Pawan spends 75% of his income, while Qureshi saves 24% of his income. What percentage of Pawan'...
142.07 + 21.89 – (128.12 ÷ 7.81 – 12.09 × 6.98) = ?
A line with slope m touches the parabola y ² = 4ax. The equation of the tangent is:
A man spends 35% of his income on food, 25% on rent, and the remaining amount on other expenses. If he saves ₹9,000, which is 20% of his income, find ...
A man invests ₹20,000 in a scheme that offers a 10% simple interest per annum. After how many years will his total amount become ₹30,000?
24, 13, ?, 29, 117, 937
If cos A = 4/5 and A is an acute angle, find the value of 3 tan A + 4 sec A.
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