A coin is flipped 25 times. How many ways can we get exactly 19 heads?
1 answer:
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Step-by-step explanation:
Below is an attachment containing the solution.
Answer:
Option (2).
Step-by-step explanation:
In the figure attached,
A, C and B are the points lying on a straight line.
2 lines EC and DC have been drawn by extending the lines from C to E and D respectively.
Ray CE is the angle bisector of ∠ACD.
That means CE divides ∠ACD in two equal parts.
m∠ACE = m∠DCE
Since m∠ACD = m∠ACE + m∠DCE
= 2(m∠ACE)
m∠ACE =
Therefore, option (2) will be the answer.
