Timmy flipped a coin one hundred times. He got 62 heads and 38 tails. Which statement best describes this situation?

1 answer:

nataly862011 [7]3 years ago

8 0

Experimental probability is the probability that is gotten frm experiment

theoretical is from calculating it with math

so we look at the ones with experimental probabiilty and cross the anwers out with theoretical probaility (cross out B and D)

look at others

probaility is (desired outcomes )/(total possible outcomes)
find total possible by adding
62+38=100

head=62
tails=38
proability of
heads=62/100=62%
tails=38/100=38%

look at choices A and C

A, 32% heads
C, 62% heads

the answer is obviously C since 68% heads is correct

answer is C

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X^2/9+2y/7 help me solve

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So firstly, we have to find the LCD, or lowest common denominator, of 9 and 7. To do this, list the multiples of 9 and 7 and the lowest multiple they share is going to be your LCD. In this case, the LCD of 9 and 7 is 63. Multiply x^2/9 by 7/7 and 2y/7 by 9/9:

$\frac{x^2}{9}\times \frac{7}{7}=\frac{7x^2}{63}\\\\\frac{2y}{7}\times \frac{9}{9}=\frac{18y}{63}\\\\\frac{7x^2}{63}+\frac{18y}{63}$