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1 answer:
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9514 1404 393
Answer:
y = 0
Step-by-step explanation:
Subtracting the right side gives ...
The factor multiplying y cannot be zero, so y must be zero.
Answer:
The probability is
Step-by-step explanation:
We can divide the amount of favourable cases by the total amount of cases.
The total amount of cases is the total amount of ways to put 8 rooks on a chessboard. Since a chessboard has 64 squares, this number is the combinatorial number of 64 with 8,
For a favourable case, you need one rook on each column, and for each column the correspondent rook should be in a diferent row than the rest of the rooks. A favourable case can be represented by a bijective function with A = {1,2,3,4,5,6,7,8}. f(i) = j represents that the rook located in the column i is located in the row j.
Thus, the total of favourable cases is equal to the total amount of bijective functions between a set of 8 elements. This amount is 8!, because we have 8 possibilities for the first column, 7 for the second one, 6 on the third one, and so on.
We can conclude that the probability for 8 rooks not being able to capture themselves is
The reasonable estimate of the current customer price index is 195. The option B is the correct option.
<h3>Customer price index</h3>Customer price index is the price index which measures the weight average of price of basket of customers goods or services.
It can be given as,
Here is the cost of market basket in current period and
is the cost of market basket in the base period.
Cost of market basket in current period is
Cost of market basket in 1983 is,
Substitute all the values in the formula
Thus the value of current CPI is 168.5 which is near about the 170.
Hence, the reasonable estimate of the current customer price index is 195. The option B is the correct option.
Learn more about the customer price index here;