OG(QR)PS-Q151

[Huang Hsin-Yi]

151 A box contains 100 balls, numbered from 1 to 100.
If three balls are selected at random and with replacement from the box, what is the probablity that the sum of the three numbers on the balls selected from the box will be odd?

Ans:1/2

想請問,紅色部份是說 球拿出來還可放回去的意思嗎?

[sunnyblue13s]

是的

[Huang Hsin-Yi]

感謝