
S3期望值
Authored by Yan Wong
Mathematics
9th Grade
Used 3+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
雞蛋壞掉的概率是0. 01,試估計在3000隻蛋中,好蛋的數目是多少?
30
300
2970
2700
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一隻蛋是壞的概率是0. 02,試估計在5000隻蛋中,壞蛋的數目是多少?
0.02
1000
100
10
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
擲一枚硬幣,正面可得10元,反面可得20元,則擲一枚硬幣得到的金額期望值為?
10
15
20
25
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一箱子內有100元鈔票3張,500元鈔票2張,則從箱中抽出一張紙鈔,金額期望值為?
200
260
300
420
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一遊戲規定擲2枚硬幣,出現1正面可得10元,出現2正面可得20元,沒有正面則須扣44元,則這個遊戲的金額期望值為?
10
1
-1
-10
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一疊鈔票中,有2張 $ 10、3張 $ 20和5張 $ 50。現隨意抽取一張,求抽出鈔票的期望值。
33
26.7
20
50
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在10 000張獎劵中,頭獎一名,獎金是 $ 500 000;二獎兩名,每名獎金 $ 20000。若全部獎劵售出,求每張獎劵的期望值。
50
54
0
52
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