1000 DS section 7 #25

[rookiez]

25. A total of 774 doctorates in mathematics were granted to United States citizens by American universities in the 1972-1973 school year, and W of these doctorates were granted to women. The total of such doctorates in the 1986-1987 school year was 362, and w of these were granted to women. If the number of doctorates in mathematics granted to female citizens of the United States by American universities decreased from the 1972-1973 school year to the 1986-1987 school year, was the decrease less than 10 percent?

1. 1/10 < W/774 < 1/9
2. W=w+5

OA C

[shibal]

c

from stmt 1 we know that W is roughly between 74 and 82.... but we don't know anything about w.... insuff

stmt 2 says that W=w+5, it could be 6,1 which will be greater than 10% but also 150,145 whcich is not.... insuff

1&2 gives us W and w, thus we can determine the %....

hope it helps

[rookiez]

I am sorry, but the solution is not clear to me!!

Also, what is meant by the last statement in question-->
"... was the decrease less than 10 percent? "