There are 100 MBA aspirants in a classroom and 99% of them are engineers. How many engineers must leave the classroom in order to reduce the percentage of engineers in the classroom to 98% ?
99% of 100 students are engineers means that there are 99 engineers.
Let 'k' be the no. of engineers who leave.
no. of engineers now = 99-k
total no. of students now = 100-k
So, (99-k)/(100-k) = 0.98
=> 99-k = 0.98(100-k)
=> 0.02*k = 1
=> k = 50
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