Answer: The correct options are
(d) 720.
(a) 336.
(c) 132.
(a) 5040.
Step-by-step explanation: The calculations are as follows:
(1) The number of ways in which six books be arranged on one shelf is given by
So, the total number of ways is 720.
Option (d) is CORRECT.
(2) Given that there are 8 girls competing in an ice-skating competition.
So, the number of ways in which they can finish in first, second, and third place is given by
Thus, the total number of ways is 336.
Option (a) is CORRECT.
(3) The number of ways in which a president and vice president can be selected from a class of 12 is given by
Thus, the total number of ways is 132.
Option (c) is CORRECT.
(4) The number of ways in which 7 students can line up for a class picture is given by
Thus, the required number of ways is 5040.
Option (a) is CORRECT.
possible route home.
How far did Robert bike on the round-trip?
Home
6 km
8 km
Library
Answer:
24 kilometers.
Step-by-step explanation:
The shortest path between two points is a straight segment that connects the two points.
Refer to the diagram attached. The 6-km segment and the 8-km segment are normal to each other. Together with the segment that joins the library and the house, the three segments now form a right triangle.
The length of the hypotenuse can be found with the Pythagorean Theorem.
.
The length of the round-trip will equal to the sum of the length of the three segments: .
Answer:
Step-by-step explanation:
There are only two ways to roll a sum of 11 (5,6),(6,5) out of 36 possible outcomes so
P(11)=2/36=1/18
as a rounded decimal 0.056