TCS Company

there r 12 children youngest is aboy. find probability of remaining childrens r boys

Read Solution (Total 3)

for other 11 children, each has two possibilities i.e being a boy or girl
so no of possibilities in total are 2*2*2*2*2*2*2*2*2*2*2= 2^11
required is all are boys so only one
prob= 1/(2^11)
11 years agoHelpfull: Yes(12) No(1)

for other 11 chidren probability will be

(1/2)^11
10 years agoHelpfull: Yes(2) No(2)
ans) 1/2^11
10 years agoHelpfull: Yes(0) No(0)

TCS Other Question

after the typist writes 12 letters n addresses 12 envelopes she inset into the envelope (1 letter /envelope).what is the probability thatexactly 1 letter is inserted in an improper envelope Anoop managed to draw 3 circles of equal radii with their centres on the diagonal of a square such that the two extreme circles touches two sides of the square and each middle circles touches two circles on either side.find the ratio of the side of the square to radius of the circles.you may assume square root of 2 is 1.4.