A boys works x+y sums, of which only y- 2z are right; how many are wrong?

Asked by guduguntlammulu28102004 | 15th Aug, 2020, 05:09: PM

Expert Answer:

Total Sums = x+y 
Correct sums = y - 2z are right;
Sums that are wrong = total - correct ones
= x + y - (y - 2z)
= x + y - y + 2z
= x + 2z

Answered by  | 15th Aug, 2020, 06:39: PM