Okay my little sis' math hw... she doesn't get it.. lol... any tips for her? These are some Q's on it.
She sais there are 2 spinners. One with 5 parts. (2 striped, 2 with dots, 1 white) and another spinner with 3 parts. (A, A, and B parts).
Okay what is the Probability if you spin one not striped and an A. She sais she thinks it's 1/2 because it would be 4/8 and that is reduced to 1/2. Well, do you think she's right?
2007-01-25 14:05:43 · 2 answers · asked by ? 2 in Science & Mathematics ➔ Mathematics
Spinner 1 has 5 possibilities.
The probability of stripes is 2 out of 5 or 2/5.
The probability of dots is 2 out of 5 or 2/5.
The probability of white is 1 out of 5 or 1/5.
Spinner 2 has 3 possibilities.
The probability of A is 2/3.
The probability of B is 1/3.
The two spinners are independent, in that spinning one has no effect on the other.
The probability of "not striped" on spinner 1 is either 1 minus the probability of getting stripes (1 - 2/5 = 3/5), or equivalently, the sum of the probabilities of getting dots or getting white (1/5 + 2/5 = 3/5).
Then the probability of "not striped" on spinner 1 AND an A on spinner 2 is the product of the individual properties:
3/5 × 2/3 = 6/15 = 2/5
2007-01-25 18:55:30 · answer #1 · answered by Jim Burnell 6 · 1⤊ 0⤋
the 1st one is comparable to penning this out.. x + y =50-4 x+y = 40 4 so what 2 numbers are the ratio 2:5 that equivalent 40 4. 35 is the biggest selection. the 2d is complicated. sorry!
2016-11-01 07:46:59 · answer #2 · answered by Anonymous · 0⤊ 0⤋