From a point 80 m from the base of a tower, the angle of elevation to the top of the tower is 28°. How tall is the tower?
2 answers:
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Answer:
a)
b)
c)
d)
Step-by-step explanation:
Given,
Number of blue socks = 4,
Grey socks = 5,
Black socks = 3,
Total socks = 4 + 5 + 3 = 12,
Ways of choosing any 2 socks =
= 66,
a) Ways of choosing 2 blue socks =
= 3,
Since,
Thus, the probability of selecting 2 blue socks =
b) Ways of choosing 2 shocks, non of them are grey socks =
Thus, the probability of selecting no grey socks =
c) ways of selecting atleast 1 black sock = ways of selecting 1 black sock + ways of selecting 2 black socks
= 30,
Thus, the probability of selecting at least 1 black sock =
d) Ways of selecting a green sock =
= 35,
Thus, the probability of selecting a green sock =