margo is going to spin the following spinner 210 times. the spinner is divided into equal sections. what is…
margo is going to spin the following spinner 210 times. the spinner is divided into equal sections. what is the best prediction for the number of times the spinner will not land on an elephant?
Answer
Explanation:
Step1: Calculate probability of not landing on elephant
The spinner has 8 equal - sections, and 5 of them are elephants. So the number of non - elephant sections is (8 - 5=3). The probability (P) of not landing on an elephant is (P=\frac{3}{8}).
Step2: Calculate the expected number of non - elephant landings
Margo spins the spinner (n = 210) times. The expected number of times the spinner will not land on an elephant is (E=n\times P). Substitute (n = 210) and (P=\frac{3}{8}) into the formula: (E = 210\times\frac{3}{8}=\frac{630}{8}=78.75\approx79).
Answer:
79