There are n students in a class. If, among those students, p% play at least 1 musical instrument, which of the following expressions represents the number of students who play NO instrument?
A. np
B. 0.01np
C. (100-p)n/100
D. 100(1-p)n
E. none of the above
2007-05-05 07:10:23 · 7 answers · asked by ghafoors2005 1 in Science & Mathematics ➔ Mathematics
Converting p into a decimal, this mean np/100 are the number of students who play at least one instrument.
So n - (np/100) is the number of students who don't play any instrument at all.
Or n(1 - p/100).
If you multiply the above by 100, you get 100n(100-p). Then if you divide by 100, you get n(100-p)/100, which is answer C.
2007-05-05 07:18:09 · answer #1 · answered by Harlan 2 · 0⤊ 0⤋
If something is 40% smaller, you merely subtract 40%. So 40% of 40 energy is sixteen: you try this by skill of multiplying 40 by skill of 0.4. the respond could be 40 - sixteen = 24 A shorter way could merely be to multiply by skill of 40 by skill of 0.6, considering it relatively is a million-0.4.
2016-10-04 10:30:30 · answer #2 · answered by ? 4 · 0⤊ 0⤋
none of the above
2007-05-05 07:46:24 · answer #3 · answered by monty 1 · 0⤊ 0⤋
none of the above: n - (p/100)
2007-05-05 07:15:29 · answer #4 · answered by Anonymous · 0⤊ 1⤋
Hi C looks sharp. Doesn't mean it's right!
2007-05-05 07:15:56 · answer #5 · answered by Cirric 7 · 0⤊ 0⤋
c
2007-05-05 07:21:11 · answer #6 · answered by Ezat Z 1 · 0⤊ 0⤋
C
2007-05-05 07:16:39 · answer #7 · answered by bigelzworth 2 · 0⤊ 0⤋