A card is drawn randomly from a standard 52-card deck. Find the probability of the specified event. The card is a 2, 3, or 7.
A. 
B. 
C. 
D. 
Answer: A
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Plot the given polar coordinate point in the polar coordinate system.
A. 
B. 
C. 
D. 
In a certain city there is a river running through the middle of the city. There are three islands and seven bridges as shown in the figure below.
It is possible to take a walk through this town, starting on the North Bank, crossing each bridge once (and only once) and ending
A. on the South Bank. B. back on the North Bank. C. on island B. D. on island C. E. none of these
Solve the problem.A combination lock has 30 numbers on it. How many different 3-digit lock combinations are possible if no digit can be repeated?
A. 870 B. 8120 C. 4060 D. 24,360
In 
, 
= 47°, 
= 3y - 7, and 
= 2(y + 10). Find the value of y.
What will be an ideal response?