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Visha

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We already know that area of a rectangle= length× breadth ~area is given= 120/49cm² ~ side( length) is given= 10/7cm >other side ( breadth)= area/ length ~>> 120/49cm² ÷ 10/7 cm = 12/7cm ( ans)
A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 14 hours, with a standard deviation of 2.5 hours. It is desired to estimate the mean viewing
A new chewing gum has been developed that is helpful to those who want to stop smoking. If 60 percent of those people chewing the gum are successful in stopping smoking, what is the probability that in a group of four smokers using the gum at least one

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