It is estimated that one third of the general population has blood type A+. If a sample of six people is selected at random, what is the probability that exactly three of them have blood type A+? Round answer to three decimal places, if necessary.
__________
What is the probability that at most three of them have blood type ? Round answer to three decimal places, if
necessary.
__________
0.219; 0.9
Mathematics
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Perform the indicated operation.Let A = 
and B = 
. Find A + B.
A. 
B. 
C. 
D. 
Mathematics
Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Mathematics
Complete the identity.tan (? - ?) = ?
A. -tan ? B. cot ? C. -cot ? D. tan ?
Mathematics
Solve.A guy wire to a tower makes a 71° angle with level ground. At a point 36 ft farther from the tower than the wire but on the same side as the base of the wire, the angle of elevation to the top of the tower is 
Find the length of the wire (to the nearest foot).
A. 40 ft B. 70 ft C. 75 ft D. 35 ft
Mathematics