Kian bought 20 pencils for $1.60. at that rate, how much would 35 dollars cost?

Mathematics

1 answer:

disa [49]11 months ago

4 0

Assuming that in the last part of the statement says pencils instead of dollars:

20 pencils for $1.60

1.60 /20 = 0.08 per pencil

For 35 pencils:

0.08 x 35 = $2.8

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cross product

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Using a number cube and this hat with 5 different-colored marbles, which simulation would help you answer this question? During

Arlecino [84]

Answer:

see the attachment

Step-by-step explanation:

We assume that the question is interested in the probability that a randomly chosen class is a Friday class with a lab experiment (2/15). That is somewhat different from the probability that a lab experiment is conducted on a Friday (2/3).

Based on our assumption, we want to create a simulation that includes a 1/5 chance of the day being a Friday, along with a 2/3 chance that the class has a lab experiment on whatever day it is.

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The simulation of 70 different choices of a random class is shown in the attachment.

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<em>Comment on the question</em>

IMO, the use of <em>70 trials</em> is coincidentally the same number as the first <em>70 days</em> of school. The calendar is deterministic, so there will be exactly 14 Fridays in that period. If, in 70 draws, you get 16 yellow marbles, you cannot say, "the probability of a Friday is 16/70." You need to be very careful to properly state the question you're trying to answer.