maths,acc......

please explain it with your views......

                        Accontancy

1)Mr. A purchased a car on 1.6.10 for
   Rs.5,60,000 and incurred Rs.25,000 for
   registration. He paid Rs.10,000 for insurance
   and Rs.1,500 for petrol. What amount should
    be debited to Car A/c.
   
a) 5,60,000 b) 5,96,000
c) 5,95,000 d) 5,85,000

 

                       Maths

1)If four couples are placed in a room, two are selected at Random

the probability that the two were a gentlemen and lady but not a couple  

a)3\7 b)4\7 c)1\7 d) None  

 

2) A committee of 5 members is to be selected from 8 boys and 3 girls the probability

that in which 2 particular girls include

a)2\30  b)12\11  c)2\11  d)8\9

 

Replies (1)

b. Couple can be selected in 4 ways - Prob = 4/28

Same gender can be selected in 2*4C2 ways = 12 - Probability = 12/28

Probability of a lady and a gentlement and not being a couple = 1-(4+12)/28 = 12/28 = 3/7

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