Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

CFA Events Calendar

View full calendar

Recommended Discussions

See how our partners can help you ace your CFA exams.

CFA Level 1 Question of the Week - Quantitative Methods

A teacher wants to select groups of 3 students out of 15 for a group work. How many different groups of 3 are possible?
AnalystPrep
CFA Question Bank and Study Notes at https://analystprep.com 
Register today for 120 free practice questions

CFA Level 1 Question of the Week - Quantitative Methods 4 votes

A. 455
50% 2 votes
B. 45
25% 1 vote
C. 225
25% 1 vote

Comments

  • The correct answer is A.

    Counting problems involve determining the exact number of ways two or more operations or events can be performed together. This particular counting problem can be solved using a combination, which is basically a selection of some given items where the order does not matter. The formula is:

    nCr = n!/((n-r)!r!)

    Where
    n=15; and
    r=3

    nCr = 15!/((15-3)!*3!) = 455
    AnalystPrep
    CFA Question Bank and Study Notes at https://analystprep.com 
    Register today for 120 free practice questions
Sign In or Register to comment.