Answer:
Step-by-step explanation:
There are 20 ballots, 8 have drawn a car the rest are white.
Find the probability to extract at least one ballot with the drawing of a car if not replaced:
1. If a ballot is taken out:
8 have drawn a car: thus we have 8/20 = 2/5
2. If two ballots are removed, probability of extracting 1 ballot with drawing of car is 8/20 leaving 7 out of 19 remaining. The 7/19 is the probability of drawing out a second ballot with the drawing of a car. Thus we have
8/20 * 7/19 = 56/380 = 14/95
3. If three ballots are removed, probability of extracting 1 ballot with drawing of car is 8/20 leaving 7 out of 19 remaining. The 7/19 is the probability of drawing out a second ballot with the drawing of a car leaving 6 out of 18 remaining. The 6/18 is the probability of drawing out a third ballot with the drawing of a car.
8/20 * 7/19 * 6/18 = 42/855
Answer:
you put two of the equations together and then the last one there you just automatically added on
Step-by-step explanation:
4x-7y=-28
25xy
Answer:
The common ratio is 0.10
Step-by-step explanation:
0.1 x 0.1 = 0.01
0.01 x 0.1 = 0.001
common ratio is the ratio of a term to the previous term.
0.1 is the previous term of 0.01
common ratio = 0.01/0.1 = 0.10
common ratio = 0.001/0.01 = 0.10
Answer:
Step-by-step explanation:
To find the volume of the given figure, one must multiply the lengths of all sides together. Therefore, set up an equation and solve,
(V) indicates volume, (l) indicates the length of the base, and (h) indicates the height of the figure.
Substitute,
Solve,
Answer:1.66
Step-by-step explanation:
