The best, closest quotient would be 87.
73. you subtract 89 and 16 and that gives you your answer which is*** 73***
Her brother is 8: 8 x 2 is 16, and 16 + 8= 24.
Given: The given function is

To find: Here we need to find the value of c for which f(x,y) will be a joint
discrete probability density function.
Solution:
Now, to find c we have,
![\int\limits^3_{-2} \,\int\limits^2_0 {f(x,y)} \, dx dy\\=\int\limits^3_{-2} \,\int\limits^2_0 {c(x-y)} \, dx dy\\\\=\int\limits^3_{-2} \,[2c-2cy]dy\\=10c-5c\\=5c\\The integral should be1.\\So, 5c=1\\](https://tex.z-dn.net/?f=%5Cint%5Climits%5E3_%7B-2%7D%20%5C%2C%5Cint%5Climits%5E2_0%20%7Bf%28x%2Cy%29%7D%20%5C%2C%20dx%20dy%5C%5C%3D%5Cint%5Climits%5E3_%7B-2%7D%20%5C%2C%5Cint%5Climits%5E2_0%20%7Bc%28x-y%29%7D%20%5C%2C%20dx%20dy%5C%5C%5C%5C%3D%5Cint%5Climits%5E3_%7B-2%7D%20%5C%2C%5B2c-2cy%5Ddy%5C%5C%3D10c-5c%5C%5C%3D5c%5C%5CThe%20integral%20should%20be1.%5C%5CSo%2C%205c%3D1%5C%5C)
∴
Therefore, the required value of c is 1/5.