purplebandit96
31.10.2020 •
Mathematics
2. A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from
the box, find the probability that it bears
a). a two-digit number
b). a perfect square number
c). a number divisible by 5.
d). a number divisible by 2 or 3.
e). a number divisible by 2 and 3.
1). a number divisible by 7.
g). a number multiple of 8.
h). a two digit number divisible by 5.
i). a two digit number divisible by 2.
j). a two digit number divisible by 3.
k). a two digit number divisible by 4.
1. a two digit number perfect square.
m).neither divisible by 5 nor 10.
n). neither divisible by 2 nor 5.
o). neither divisible by 3 nor 5.
p). a perfect cube number.
9). a prime number
r). a two digit prime number.
s). an even prime number.
1). a number is not divisible by 5.
u). a number is not divisible by 3.
v). a number is not divisible by 2 and 3.
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Ответ:
720º
Step-by-step explanation:
I used the formula:
(6-2)x180º
The 6 is bolded because that's how many sides there are on the shape. So basically the formula for most polygons is (s-2)x180º.
Hope it helps!