Question
Stretching helps prevent lower back pain __________
tightness in the lower body. In the following question, the sentence given with blank to be filled in with an appropriate word. Select the correct alternative out of the four and indicate it by selecting the appropriate option.Solution
The sentence is emphasizing on how stretching helps in preventing lower back pain. Out of all the alternatives, ‘by removing’ fits perfectly in the blank. Stretching helps prevent lower back pain by removing tightness in the lower body.
A car travels 300 km at a speed of 60 km/h and another 200 km at a speed of 80 km/h. Find the approximate average speed of the car for the entire journey.
Solve:  ∫[(x4 – 2x3 + x2 – 2x)/(x-2)] dx
The mean and standard deviation of 6 observations are 10 and 3 respectively. If each observation is multiplied by 4 and then 5 is added to each result, ...
The following table shows the distribution of marks (out of 100) obtained by 60 students:
The weights (in kg) of 11 students are:
40, 45, 47, 50, 52, 52, 55, 55, 55, 60, 65
Find:
(a) the mean weight,
(b) the median weight,
A right square pyramid has a base of side 10 cm and slant height 13 cm.
(a) Find its lateral surface area.
(b) If its vertical height is 1...
The median of the following distribution is:
If a = 0.121212… (repeating) and b = √5, state whether each is rational or irrational.
If Seema had run at a speed of 14 km/hr instead of 7 km/hr, she would have covered 20 km more distance. What would have been the actual distance cover...
The following table shows the marks obtained by five students in three subjects:
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