From a bag containing 10 black and 20 white balls , a ball is drawn at random. What is the probabity that it is black?
1
5
8
12
20. What is the probability of picking a card that was red or black?
1
12
16
18
21. A bag contains 6 white, 4 red and 10 black balls. Two balls are drawn at random. Find the probability that they will be both black
0.237
0.585
0.789
0.885
22. A bag contains 8 white balls and 4 red balls. Five balls are drawn at random. What is the probabity that 2 of them are red and 3 white?
0.424
0.858
0.748
0.699
23. The chi square test was first used by:
Karl pearson
fayol
taylor
mary parker
24. The other na me of convenience sa mpling is called as:
quota sa mpling
accidential sa mpling
judge ment sa mpling
Cluster sa mpling
25. Which of the following are non probabity sampling?
quota sa mpling
Cluster sampling
systematic sampling
simple random sampling
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6
Answer:
19) 12
20)18
21)0.237
22) karl person
23)quota s mplilming
24)
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