A spinner number 1-10 is spun. Each number is equally likely to be spun. What is the probability of spinning: 1. an odd number OR a power of three?2. a number less than 8 OR a divisor of 15?

Answer:

B) Probability of number less than 8 OR a divisor of 15 = 1

Step-by-step explanation:

Given that the spinner number 1-10, therefore sample space = 10.

Each number is equally likely to be spun = 1/10 for each number.

A) probability of having an odd number OR a power of three?

Probability of odd number = number of odd number from 1-10 / sample space

Number of odd number = 5 {1,3,5,7,9}

Probability of odd number = 5/10 = 1/2

Probability of power of three = number of power of three from 1-10 / sample space

power of three from 1-10 = 1 (1x1x1) and 8 (2x2x2)

number of power of three from 1-10 = 2 {1,8}

Probability of power of three = 2/10

probability of having an odd number OR a power of three = probability of having an odd number + a power of three

probability of having an odd number OR a power of three = 5/10 + 2/10 = 7/10

B) probability of number less than 8 OR a divisor of 15

Number less than 8 = 7 {1,2,3,4,5,6,7}

Probability of number less than 8 = 7/10

Divisor of 15 from 1-10 = 3 {1,3,5}

Probability of divisor of 15 = 3/10

Probability of number less than 8 OR a divisor of 15 = probability of number less than 8 + a divisor of 15

Probability of number less than 8 OR a divisor of 15 = 7/10 + 3/10 = 10/10 = 1

The Probability of having an odd number OR a power of three is 7/10

The probability of a number less than 8 OR a divisor of 15 is 1.

What is the probability?

Probability refers to a possibility that deals with the occurrence of random events. The probability of all the events occurring need to be 1.

The formula of probability is defined as the ratio of a number of favorable outcomes to the total number of outcomes.

P(E) = Number of favorableoutcomes / total number of outcomes

It is given that the spinner number 1-10, So sample space = 10.

Each number is equally likely to be spun

A) probability of having an odd number OR a power of three

Probability of odd number = number of odd numbers / sample space

Number of odd number = {1,3,5,7,9}

Probability of odd number = 5/10

                                           = 1/2

Probability of power of three = number of power of three / sample space

power of three from 1-10 = 1 and 8

number of power of three = 2

Probability of power of three = 2/10

Probability of having an odd number OR a power of three = probability of having an odd number + a power of three

= 5/10 + 2/10

= 7/10

Therefore, the probability of having an odd number OR a power of three is 7/10

B) Probability of number less than 8 OR a divisor of 15

Number less than 8 = {1,2,3,4,5,6,7}

Probability of number less than 8 = 7/10

Divisor of 15 from 1-10 = {1,3,5}

Probability of divisor of 15 = 3/10

Probability of number less than 8 OR a divisor of 15 = probability of number less than 8 + a divisor of 15

= 7/10 + 3/10

= 10/10

= 1

Therefore, the Probability of a number less than 8 OR a divisor of 15 is 1.

Learn more about probability :

brainly.com/question/795909