A spinner is broken into equally slices labeled 1 to 12. What is the probability

Question

A spinner is broken into equally slices labeled 1 to 12. What is the probability that a random spin will result in a number less than 2? Answer in decimal form. Round to decimal places as needed. A math-Olympics is being held this week end among SPC Math professors. There are 40 professor signed up, and the first 3 finishes will receive $100, 150, and 120, respectively. If we assume that each professor has an equal chance of winning what is the probability that Prof. Weidman will finish second? Answer inn decimal form. Round to 3 decimal places as needed. List bought a box of 30 AA batteries at a garage sale. Her "loving" husband tested the batteries and tells her that 10 of them are bad (of course he mixed the bad batteries back in with the good). If use were to randomly select 4 batteries for her calculator, what if the probability that all 4 are bad? Answer in decimal form. Round to 3 decimal places as needed.

Explanation / Answer

I am allowed to answer only one question at a time.

17)
There are total 12 slices
so n(S) = 12
event is for number less than 2.
there is only one possibility which is number 1
n(E)= 1
Probability = n(E)/n(S) = 1/12
Answer : 1/12

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