and 8 copies of a draw program. Three of the word processing , four of the spread sheet, and two of the draw programs are infected with a computer virus. If a program is selected at random, the probability it is infected with a virus?
a. 11/30
b.7/30
c. 3/10
d. 1/4
2007-09-15 15:42:50 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
total number of programs = 10 + 12 + 8 = 30
total number of infected programs = 3 + 4 + 2 = 11
therefore probablity program is infected = 11/30 (a)
2007-09-15 15:48:37 · answer #1 · answered by Ben B 2 · 0⤊ 1⤋
C
Since you are choosing a program at random, all you really need to know is that there are 30 programs, 9 of which are infected. So you have a 9/30 (or 3/10) chance of selecting an infected program
2007-09-15 15:50:26 · answer #2 · answered by MistWing 4 · 0⤊ 0⤋
How many programs have they in total? (10+12+8)
How many programs have the virus? (3+4+2)
Create the fraction & simplify it.
2007-09-15 15:50:13 · answer #3 · answered by Robert S 7 · 0⤊ 0⤋
you need to objective a utility kit called 'laplink'...we used to apply it interior the place of work to bypass the comprehensive contents (courses and archives) of one laptop to a various. good success
2016-10-09 06:24:49 · answer #4 · answered by ? 4 · 0⤊ 0⤋
c
2007-09-15 15:54:21 · answer #5 · answered by john 4 · 0⤊ 0⤋