Question

1. Solve 16+14÷2+3⋅5−11

O 75

O 79

O 27

O 23

2. A group of scientists are providing an experiment on simultaneous tossing of 5 coins. The result of the experiment is the final amount of tails that will drop out. How many possible consequences can be at the end of this experiment?

O 10

O 5

O 3

O 6

Answers

  1. Answer:
    1. 27
    2.6
    Step-by-step explanation:
    1.
    remember the priorities of operations :
    1. brackets
    2. exponents
    3. multiplications and divisions
    4. (and truly last) additions and subtractions
    so,
    16 + 14÷2 + 3×5 – 11 =
    16 + 7 + 15 – 11 = 23 + 4 = 27
    2.
    5 coins are tossed at the same time.
    each coin has a result (head or tail).
    but the observed event is the sum of all tails that show when tossing the 5 coins.
    so, the possible outcomes are
    0 tails
    1 …
    2 …
    3 …
    4 …
    5 tails
    so, in total, 6 different possible outcomes.

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