A four digit number ( numbered from 0000 to 9999) is said to be lucky if the sum of its first two digits is equal to the sum of its last two digits. If a four digit number is picked at random; then find the probability that it is a lucky number.
(a) Required probability =0.067
(b) Required probability =0.077
(c) Required probability =0.167
(d) Required probability =0.177
A four digit number ( numbered from 0000 to 9999) is said to be lucky if the sum of its first two digits is equal to the sum of its last two digits. If a four digit number is picked at random; then find the probability that it is a lucky number.
(a) Required probability =0.067
(b) Required probability =0.077
(c) Required probability =0.167
(d) Required probability =0.177
Harshit Singh , 3 Years ago
Grade 12th pass
