There are C(29, 4) = 29!/(4! (29 - 4)!) ways of selecting any 4 students from the total 21 + 8 = 29 students.
The teacher has C(21, 2) = 21!/(2! (21 - 2)!) ways of picking out 2 sophomores and C(8, 2) = 8!/(2! (8 - 2)!) ways of picking out 2 freshmen, so there are
C(21, 2) • C(8, 2) = 5880
possible ways of picking out 2 sophomore and 2 freshmen.
The probability of picking out a group of students like this is then
C(21, 2) • C(8, 2) / C(29, 4) = 280/1131 ≈ 0.2476
Answer:
ang hirap naman anong grade po yarn
Answer: b. Collaboration that includes diverse backgrounds and perspectives can eliminate the need for software testing.
Explanation:
While collaborating and creating a team that includes diverse backgrounds and perspectives is good for anticipating the needs of the people that will use the software as well as avoid bias, it does not take away the need for software testing.
Software testing must always be carried out as it is a practical test that actually shows whether the software developed is going to match the needs and requirements of the end users.
