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.
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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.
the number of students who pass the test math or physics.
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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
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
hope it will help u
thank you, it really help me. can i ask more questions?
yes,u can ask me
two wallets containing coins. The first wallets containing five pieces of five hundred rupiahs and two pieces of hundreds rupiahs. other wallets containing one piece of five hundred rupiahs and three pieces of hundreds rupiahs. if the coins are taken randomly from one wallets, determine opportunities to earn coins hundreds rupiahs.
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