Simplify 3(2x+5)-4(2x-7)
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Given:
A fair die is rolled.
It pays off $10 for 6, $7 for a 5, $4 for a 4 and no payoff otherwise.
To find:
The expected winning for this game.
Solution:
If a die is rolled then the possible outcomes are 1, 2, 3, 4, 5, 6.
The probability of getting a 6 is:
The probability of getting a 5 is:
The probability of getting a 4 is:
The probability of getting other numbers (1,2,3) is:
Now, find the sum of product of payoff and their corresponding probabilities to find the expected winning for this game.
On further simplification, we get
Hence, the expected winnings for this game are $3.50.
The given formular is the chemichal formular for sodium chromate.
The chemical formular for sodium chromate is
.
Therefore, the value of x is 2 and that of y is 1.
The chemical formular for sodium chromate is
Therefore, the value of x is 2 and that of y is 1.