Question

Please help me! Will give medal :)
Which set of data shows forty percent as the experimental probability of a particular traffic light being green on your way to school in the morning?

Answer 1

A)ten of twenty-five selections at random from a card deck being a black card, with black representing a green light

B)2 tails in twenty coin flips, with tails representing a green light

C)2 odd-numbers in 8 rolls of a standard die, with odd numbers representing a green light

D)spinning twenty vowels out of forty spins of a spinner with 6 equally divided sections labeled with 3 vowels and 3 consonants

Answer 2

@phi please help

Answer 3

can you write the ratios for each choice A,B,C and D ?

Answer 4

A)10:20
B)2:20
C)2:8
D)Idk

Answer 5

re-read choice A and try again

Answer 6

10:25

Answer 7

now change that to a percent. the first step is multiply "top" and "bottom" by 4

Answer 8

40/100
0.4=40%

Answer 9

yes.

btw, D is 20:40 (because a spinner with 6 equally divided sections labeled with 3 vowels and 3 consonants means the chance of a vowel is the same as a chance for a consonant)
(in other words, this is very similar to 20 tails out of 40 flips problem)

Answer 10

ok..thank you so much!! so the answer is A

Answer 11

if you work out the other choices, they will not have 40%
A)10:25 = 40%
B)2:20 = 1/10 = 10%
C)2:8 = ¼ = 25%
D) 20:40= ½ = 50%

Answer 12

ohhh,ok.. thanks agian

Answer 13

the only way to get good at this stuff, is work at it. I would try to change each choice to a decimal and then a percent and check that I got it right.

Answer 14

k:)