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if arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y=10-2x

`109.53. In AABC the perpendiculars drawn from A Band C meet the opposite sides at D E and F respectively AD BE and CF intersect at pointP. If _EPD = 116° and the bisectors of ZA andLB meet at Q then the measure of ZAQB is :AABC में A B और C से लंबवत खोंची गई रेखाएं विपरीतभुजाओं पर क्रमश: D E और F पर मिलती है। AD BE और CFबिंदु P पर परस्पर काटती हैं। यदि ZEPD = 116° है और ZAऔर B के द्विभाजक Qपर मिलते हैं तो ZAQB की माप कितनीहोगी?(A)96°(B) 122°(C) 124°(D) 64°-04. The perimeter of two similar triangles ABC`

A and b can complete a certain work in 24 days and 42 days ,respectively .A started the work and after x days b joined him and the whole work was completed in 20 days .The value of x is

p+q = 7
pq = 5
then find p3+ q3 = ?

Pipes A and B are emptying pipes and can empty a tank in 6 hours and 16 hours, respectively. C is a filling pipe. All the three pipes were opened together. They took 80 minutes to empty 18 th of the tank. Pipe C alone can fill the tank in:

35:66::29:?

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a boat goes 3.6 upstream