MathematicsPermutation and combinationJAMB
In how many ways can 2 prefects be chosen from 10 students (that is, ¹⁰C₂)?
Show answer
Answer: D. 45
¹⁰C₂ = (10 × 9)/2 = 45.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.