Answer:
Frank must buy 2 pens to have equal number of each pens
Time:logs=time:logs
time/logs=time/logs
4hours:6logs=18hours:xlogs
4hours/6logs=18hours/xlogs
4/6=18/x
6/4=18/x
x=27
pick B,C,E
9880 different possibilities are there in Sally's new combination option second 9880 is correct.
<h3>What is permutation and combination?</h3>
A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.
We have:
Total unique numbers consists in a Sally locker = 3
From the digits 0 to 39
Total numbers = 40
Apply combination formula:
= C(40, 3)
= 40!/(3!37!)
= 9880
Thus, 9880 different possibilities are there in Sally's new combination option second 9880 is correct.
Learn more about permutation and combination here:
brainly.com/question/2295036
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So first, you subtract 9 and 4, which gives you 5. Then, you add that to 5. That gives you 10.
Answer:
debes hacer l regla de tres
Step-by-step explanation: