tition is allowed b if no repeats are allowed c Find the number of combinations of 2 elements taken 2 at a time Does this answer differ from that in par b a If repetition is allowed how many ways can 2 letters be chosen from the set P Q if order is important Ch the correct formula below and if necessary fill in the answer boxes to complete your choice Type the terms of your expression in the same order as they appear in the original expression A 2P BM 2 How many ways can 2 letters be chosen from the set P Q if order is important 4 b If no repeats are allowed how many ways can 2 letters be chosen from the set P Q if order is important the correct formula below and if necessary fill in the answer boxes to complete your choice Type the terms of your expression in the same order as they appear in the original expression OA M 21 2 2 How many ways can 2 letters be chosen from the set P Q if order is important c Find the number of combinations of 2 elements taken 2 at a time Choose the correct formula below and necessary fill in the answer boxes to complete your choice Type the terms of your expression in the same order as they appear in the original expression OA M B 21 2 2 2 Find the number of combinations of 2 elements taken 2 at a time