Answer:
1/2.
Step-by-step explanation:
Probability totals must add up to 1.
P = probability.
If P(any number other than 6) = x, then P(6) = 3x, so
3x + 5x = 1
x = 1/8
P(6) = 3/8 and P(not 6) = 1/8
Therefore P(6 or 1) = 3/8 + 1/8 = 1/2 (answer).
The probability of rolling a value of 1 or 6 for the unfair die ls 1/2
The probability of an event is given as :
P(event) = Required outcome / Total possible outcomes
Let the probability of other numbers on the die = n
Therefore, Probability of 6 = 3n
The Cummulative probability can be expressed thus since the Cummulative sun must be equal to 1 :
Other values on the die are 5 ; 1, 2, 3, 4, and 5
5n + 3n = 1
8n = 1
n = 1/8
The probability of other numbers = 1/8
Probability of 6 = 3(1/8) = 3/8
Probability of (1 or 6) = P(1) + P(6) = 1/8 + 3/8 = 4/8 = 1/2
Therefore, the probability of obtaining 1 or 6 is 0.5
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