1.25 divided by 8 =0.15635×100=15.6% or round up to 16%
They are both periodic functions that look like waves. They both have a period of 2pi and oscillate between 1 and -1.
X=4. Hope this is the one you wanted me to answer.
8/20as well，since the number of green beads and yellow beads is the same，so equal probability
5×9/10=4.5
9/10 1 8/10 2 7/10 3 6/10 4 5/10
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5 5/10=4 1/2=4.5
