The college wants to select 75 B.Tech level students for a conference from various departments. The number of students in BSD are 200, Engineering 180 and IT 120. If the students are chosen...

The college wants to select 75 B.Tech level students for a conference from various departments. The number of students in BSD are 200, Engineering 180 and IT 120. If the students are chosen proportionately, which of the following are the correct samples as per stratified sampling technique? a. BSD-30, Engineering-18, IT-27 b. BSD-27, Engineering-30, IT-18 c. BSD-30, Engineering-27, IT-18 d. BSD-30, Engineering-20, IT-10