Suatu kelas terdiri dari 40 siswa. peluang seorang siswa lulus tes matematika adalah 0,4. peluang seorang siswa lulus tes fisika adalah 0,2. tentukan banyaknya siswa yang lulus tes matematika atau fisika.

1
write ur question in english language
One class consists of 40 students. the chances of a student passed the math test was 0.4. the chances of a student pass the test of physics is 0.2. specify
the number of students who pass the test math or physics.

Answers

2015-04-27T12:18:23+05:30
Let A be the student those pass in math
let B be the student those pass in physics
total no of student=40
0.4 chances of passes in math=no. of student passes math =0.4
                                                 total no.of student
A/40=0.4
A=0.4×40=16
0.2
similarly B/40=0.2⇒B=40×0.2=8

n(A)=16
n(B)=8
n(AUB)=n(A)+n(B)-n(AnB)
16+8-0
24 are student who pass the test physics or math

0
type ur question on brainly question list
okay, sorry
im a newbie :)
ok,no prob.I can't solve ur prob here properly
so,i am saying so