Question

If you spin the spinner 400 times, how many times can you expect it to land on an even number?

please solve with explaining what you did too, i don’t get this.

Answer 1

You would expect the arrow to land on an even number about 25% of the time.

Explanation:

In the sector labeled 1 you would expect it to land on it 50% of the time because that sector takes up 50% of the spinner. For the rest of the sectors, you would take to the remaining 50% and divide it by four for the four other sectors on the spinner. 50 ÷ 4 = 12.5 Then you would take the number of even numbers there are on the spinner, which is two in the case, and add those percentages together. 12.5 + 12.5 = 25

Answer 2

The expected number of even numbers is 100

From the spinner given ;

• P(1) = 0.5

The probability of other values = 0.125

Even numbers on the spinner ; (2 , 4)

Probability of obtaining an even number on each spin = (0.125 + 0.125) = 0.25

For 400 spins ;

• 0.25 × 400 =

Hence, the expected number of outcomes is 100