Is this a problem in advanced probability or in basic algebra?
Let S be the sum of all items except for the two items in question. Then . From here you can find and calculate . Actually, .
'"the mean of 200items is 50, later it was discovered that two of the items used to derived the mean i.e 92 and 8 were actually 192 and 88. what is the corrected mean after replacing the right items (192and 88)?". have tried all i could but could not arrived at the answer, what is it am missing here i mean right procedure, contributions will be highly appreciated.
this is for practice purpose. thanks