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The Standard Deviation of five numbers is ‘4’. If each and
every number is added with 5 then the new standard deviation
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Aditi Other Question
A boat moves down stream at the rate of 1 km in 6 minutes and
upstream at the rate of 1 km in 10 minutes. The speed of current is
In boring a well 50 m deep, the cost is
Rs.4/– for the first meter. The cost of each successive meter
increases by Rs.2/–. What is the cost of boring the entire well?