Apresident and vice president will be selected from among 35 members of a board. should permutations or combinations be used when determining the number of possible ways these offices can be filled? a)combinations should be used because a president is the same as a vice president. b)combinations should be used because a president is different from a vice president. c)permutations should be used because a president is the same as a vice president. d)permutations should be used because a president is different from a vice president.

D) Permutations should be used because a president is different from a vice president.

Step-by-step explanation:

We know that Permutation is a method of arranging the elements of a set in an order or a sequence i.e. order matters.

On the other hand Combination is a selection of elements of a set the order doesn't matter. It .

Given statement : A president and vice president will be selected from among 35 members of a board. here order matters as none of them can be selected for more than one post.

Therefore, Permutations should be used because a president is different from a vice president.

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.