D.
1 answer:
Step-by-step explanation:
total subject = S = 560
football = 320
volleyball = 300
all people like at least one games = 500
i. both games (b)
football only = 320 - b
volleyball only = 300 - b
so
500 = (320 - b) + (200 - b) + b
500 = 320 - b + 200 - b + b
500 = 520 - b
b = 520 - 500 = 20 people
ii. do not like play both games
S - All people like = 560 - 500 = 60 people
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Answer:
The statement is false.
Step-by-step explanation:
Here we need to remember some things:
Integer numbers are closed under multiplication.
This means that for two integers a and b, the product a*b is also an integer.
A rational number is a number that can be written as the quotient of two integer numbers.
An irrational number is a number that can't be written as the quotient of two rational numbers.
Now let's see the statement:
"The product of two rational numbers is irrational."
The product of two rational numbers is written as:
Where a, c, b, and d are integers.
We can rewrite that product as:
Because of the first property, we know that a*c is an integer, and b*d is also an integer, so here we have a quotient of two integer numbers, so this is a rational number.
Then the product of two rational numbers is a rational number.
Then the statement is false.