If there are 150 total instruments in said Orchestra, we'll need to divide that number in half. 75, simple enough. Now we know that half of 150 is 75. Start by writing your problem like this: 150= 75w+37.5b That equation is all I can think of, because 37.5 is half of 75, which means that's roughly the number you're looking for. Sorry if this doesn't help much<span />
The answer is c because the mean u have to add all of the and then Divide and the for the median u have to put them in order and then select the middle one like for this one we had to do 50+52=102/2 which it was 51 and the mode is 67