Which of the following describes a simple event?

a. spinning “back 2 spaces” on a spinner and drawing a blue or red marble from a box
b. spinning “back 2 spaces” on a spinner
c. rolling an odd number on a die and getting tails on the toss of a coin
d. tossing a coin 5 times and getting heads twice

Option B is correct.

Step-by-step explanation:

B- Spinning “back 2 spaces” on a spinner is a simple event. The probability that it will get 2 spaces back from where it started first is a single event.

A involves probability of landing 2 spaces back along with the probability of drawing a blue or red marble from a box. This is compound event.

C also involves 2 probabilities.The probability of getting an odd number on a die plus the probability of getting tails on the toss of a coin.  

D involves 5 probabilities with one probability for each toss.  

Therefore, option B is correct.

nope

step-by-step explanation:

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b