eshaesmot12345
23.11.2020 •
Mathematics
A bag contains coloured balls.
A ball is taken at random from the bag, its colour is noted, and the ball is replaced.
A second ball is taken at random from the bag, its colour is noted, and the ball is
replaced.
The probability that the ball is red is 0.2.
First ball
Second ball
0.2
Red
Red
0.2
0.8
Not red
0.2
Red
0.8
Not red
0.8
Not red
Work out the probability that only one of the two balls taken is red.
Solved
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Ответ:
v = 5
Step-by-step explanation:
-multiply the parentheses by - 6
-move the terms
-collect like terms than subtract
-divide both sides by 5