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3 years ago

kylie has 80% of the total points possible in her science class. if 350 points are possible, how many points does kylie have?

Mathematics

2 answers:

enyata [817]3 years ago

6 0

Answer:

280

Step-by-step explanation:

Change percentage into decimal:

80% = 0.80

Find 80% of 350:

350 x 0.80 = 280

Alex777 [14]3 years ago

6 0

Answer: 280

Step-by-step explanation: In order to figure out how many points Kyle has in her science class, we need to find 80% of all the possible points which is 350 points.

To find 80% of 350, first write 80% as a decimal by moving the decimal point two places to the left to get .80.

Next, the word "of" means multiply, so we multiply .80 by 350.

(.80) (350) = 280

Therefore, Kylie has 280 points in he science class.

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There are two methods to find this answer.

Method 1) We have 6 girls and 8+6 = 14 students. The probability of picking a girl is 6/14 = 3/7. After the first girl is chosen, we have 5 girls left out of 14-1 = 13 students overall. The probability of picking another girl (assuming the first selection was a girl) is 5/13. Multiply these probabilities: (3/7)*(5/13) = (3*5)/(7*13) = 15/91

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Method 2) We can use the nCr combination formula. Order does not matter.

We have nCr = 6 C 2 = 15 ways to pick 2 girls. See the attached image below for the steps (figure 1)

Out of nCr = 14 C 2 = 91 ways to pick 2 students. See the attached image below for the steps (figure 2)

So that's another way to get the answer 15/91.