Answer: it could be a mangintic force.. Because if two magnets a.k.a the north and south pole magnets are brought together they will push each other away instead of sticking.
Hope this helps
Correct question:
An urn contains 3 red and 7 black balls. Players A and B withdraw balls from the urn consecutively until a red ball is selected. Find the probability that A selects the red ball. (A draws the first ball, then B, and so on. There is no replacement of the balls drawn).
Answer:
The probability that A selects the red ball is 58.33 %
Step-by-step explanation:
A selects the red ball if the first red ball is drawn 1st, 3rd, 5th or 7th
1st selection: 9C2
3rd selection: 7C2
5th selection: 5C2
7th selection: 3C2
9C2 = (9!) / (7!2!) = 36
7C2 = (7!) / (5!2!) = 21
5C2 = (5!) / (3!2!) = 10
3C2 = (3!) / (2!) = 3
sum of all the possible events = 36 + 21 + 10 + 3 = 70
Total possible outcome of selecting the red ball = 10C3
10C3 = (10!) / (7!3!)
= 120
The probability that A selects the red ball is sum of all the possible events divided by the total possible outcome.
P( A selects the red ball) = 70 / 120
= 0.5833
= 58.33 %
Answer:
h<10
Step-by-step explanation:
Answer #1 is 10
Answer #2 is 20%
Answer #3 is 65
Answer #4 is 1/4
Answer #5 is 1, 3, 5, 15
Answer #6 is 7, 14, 21
Answer #7 is Yes
Answer #8 is =
Answer #9 is 0.05 is bigger
Answer #10 is =
