The average of 10 observations is 46. It was realized later that an observation was misread as 42 in place of 142. The correct average is:
Sum of all numbers = 46 × 10 = 460 Correct sum = 460 - 42 + 142 ⇒ 602 - 42 ⇒ 560 Correct Average = 560/10 ⇒ 56 ∴ The correct average is 56.
74% of 2840 + 80% of 1640 - ?= 47²
What will come in place of the question mark (?) in the following question?
24.30% of 372.32 = ?
25.6% of 250 + √? = 119
182 – 517 ÷ 11 - √361 = ?
1365 ÷ 15 + (? ÷ 5) = 62 × 3.5
The alarms of two alarm clocks sound at regular intervals of 72 seconds and 80 seconds. If they beep together for the first time at 6:00 am, at what tim...
(168 ÷ 12 + 19 × 64)/(22+1)
33 + (6.25) % of 1600 = ? + 2 X 55
[4(1/3) + 4(1/4)] × 24 – 62 = ?2
