Answer: 7/12
Step-by-step explanation:
70/120 simplified is 7/12
The probability that a random button picked from a jar is either a red or a blue button is, 7/12.
The probability of happening of an event is given by the number of elements in that event divided by the sample space
The sample space is the total number of buttons in the jar.
Therefore sample space
=30+40+50=120.
The event is that we pick one button randomly from a total of 120 buttons can be done in
=120C1 =120.
The event that the button is either red or blue which means that we select a button from the total number of red + total number of blue buttons.
∴ We select one button from
=30+40=70 buttons,
which can be done in
=70C1 = 70.
Therefore answer
=70÷120(happening event/sample space)
= 7÷12.
Therefore, the probability that a random button is picked from the jar and the button is red or a blue button =7/12.
Learn more about probability, refer:
https://brainly.com/question/23417919
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