1).if p invested 10% si & q invest 5% compounded annualy after 2 yrs p & q interests are sum then
ans: p = 41q/80.
2).if there are 3 white,2 black ballss 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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