1).if p investd 10% simple interest & q invest 5% compounded annualy after two years p & q interests are sum then
ans:p = 41q/80.
2).if there are 3 white,2 black balls in urn 1& 4 white,6 black balls in urn 2.if one ball is taken from urn 1 & transferred to urn 2 then probability that the ball drawn from urn 2 is white is
ans: 23/55.
3).an urn contains 3 white,5 black & another urn contains 4 white,2 black.one ball is drawn from each of the bag find the probability of getting both white balls.
ans: 1/4.
4).a bag contains 5 red,4 blue, & M green balls if the probability of getting both the balls green,when two balls are selected at random is 1/7,find M.
ans: 6.
5).the probability that a girl student gets scholarship is 0.6 & that of a boy is 0.8,then probability that at least one gets the scholarship is
ans: 0.92.
6).postal index number established ?
(a).1970, (b).1972,(c).1974,(d).1980.
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