08-08-2014, 11:40 PM
consider the 4 digit no abcd what is the probability that sum of the digits is greater than or equal to 4 ?
a) 899/900
b) 1/900
c) 299/300
d) 599/600
answer choice d
solution
case 1 sum of digits =1
case 2 sum of digits =2
case 3 sum of digits =3
probability (sum of digits > or equal to 4) = 1-1/600
=599/600
a) 899/900
b) 1/900
c) 299/300
d) 599/600
answer choice d
solution
case 1 sum of digits =1
case 2 sum of digits =2
case 3 sum of digits =3
probability (sum of digits > or equal to 4) = 1-1/600
=599/600