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7 white balss,and 3 balck balls are randomly placed in a row..find the problity tht no two blck balls are palced adjacnt to each other..

Read Solution (Total 5)

total combinations=10!/(71*3!)
=120
probability=8c3/120=7/15
11 years agoHelpfull: Yes(21) No(0)

place 7 balls in a single line...
count blank spaces btween dem
ans. 8c3
11 years agoHelpfull: Yes(5) No(1)
answer is 8c3
11 years agoHelpfull: Yes(5) No(0)
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11 years agoHelpfull: Yes(3) No(2)
8c3/120 z crrct
11 years agoHelpfull: Yes(0) No(1)

TCS Other Question

For real number x, int(x) denotes integer part of x.int(x) is the largest integer less than or equal to x.int(1,2)=1,int(-2,4)=-3.
Find the value of int(1/2)+int(1/2+100)+int(1/2+2/100)+....+int(1/2+99/100) 1. If 3y + x > 2 and x + 2y?3, What can be said about the value of y?
A. y = -1
B. y >-1
C. y