Question
If the sum of upstream and downstream speed is 30 km/hr
and the speed of the current is 6 km/hr. Then find time taken to cover 84 km in downward?Solution
Let the speed of boat in still water be x km/hr. According to the question, => x + 6 + x − 6 = 30 => x = 15 Downstream speed = 6 + 15 = 21 km/hr Required time = 84/21 = 4 hrs
For the cumulative distribution function
the upper quartile point is
The probability of getting a total of 7 on two dice thrown together is:
If the odds in favour of any random event A are 5 : 6, then the odds against the event are:
If price-quantity are related for base year (0) and current year (1) are
∑ : p0q0 = 260,∑ : p1q0 = 395,∑ : p0q1 = 264,∑ : p1q1 = 422, t...
The Pension Fund Regulatory and Development Authority (PFRDA) launched Retirement Income Schemes (RIS) under NPS in May 2026. Up to what age can NPS sub...
Using the method of semi-averages, secular trend is measured when:
Fundamental principles of design of experiment are
(I) Randomization
(II) Replication
(III) Local control
Which option is correct?
The mean and median of the distribution is 12 and 15. Then the mode equals to:
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