a spinner has sections that are numbered 1 through 7. liam spins the spinner 20 times and records his…
a spinner has sections that are numbered 1 through 7. liam spins the spinner 20 times and records his results in the dot - plot. use the results to predict the number of times the spinner will land on an odd number in 200 trials.
Answer
Explanation:
Step1: Count odd - numbered results in 20 trials
Count the dots for 1, 3, 5, 7. There are 4 + 1+ 2 + 2 = 9 dots for odd - numbered results in 20 trials.
Step2: Set up proportion
Let $x$ be the number of times the spinner lands on an odd number in 200 trials. The proportion is $\frac{9}{20}=\frac{x}{200}$.
Step3: Solve the proportion
Cross - multiply: $20x = 9\times200$, so $20x=1800$. Then $x=\frac{1800}{20}=90$.
Answer:
90