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raketka [301]
3 years ago
15

A jar contains 30 red marbles, 50 blue marbles and 20 white marbles.You pick one marble from the jar at random. Find each theore

tical probability.
(a) P (red)

(b) P (not white)
Mathematics
2 answers:
sesenic [268]3 years ago
7 0
There’s 100 total marbles, 30 being red. That would be 30/100 chance. Simplify it to get the lowest you can.
a. 3/10
There’s 20 white marbles. Subtract that from 100 to get your answer, 80/100. Simplify.
b.8/10
lesya [120]3 years ago
4 0

Answer:a = \frac{3}{10} , b =  \frac{4}{5}

<u>Step-by-step explanation:</u>

P(red) = \frac{red (marbles)}{total(marbles)}

          = \frac{30}{30+50+20}

          = \frac{30}{100}

          = \frac{3}{10}      <em>simplified</em>

P(not white) = \frac{red + blue(marbles)}{total(marbles)}

                    = \frac{30+50}{30+50+20}

                    = \frac{80}{100}

                    = \frac{4}{5}      <em>simplified</em>

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Answer:

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Step-by-step explanation:

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