Basically, since both fractions have a like denominator, you just have to add across, but if the denominators were different, you'd have to to do more work. and it's the same without the denominators because all you're really doing is just crossing them out and adding across.
12———-100%
8 ———— x
X=(8*100)/12=800/12=66.66%
Then discount percent is 100-66.66=33.33%
The spinner has no memory. The probability of a 'B' is 1/12 or 8-1/3%. The first time, the 10th time, and the millionth time. No matter what has happened before.
18 could round to 20
31 could round to 30
30 x 20 would be 600
Pretty sure that’s your best estimate,
600
8 people received a Baseball Cap
12 people received a Coffee Mug
Hope this helped!
