Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?

A 1/2
B 9/20
C 3/5
D 8/15

Correct Answer: 9/20

Multiples of 3 or 5 in the range from 1 to 20 : 3,5,6,9,10,12,15 18,20 Total = 9 Probability = 9/20
Bissoy MCQ
#গণিত #সম্ভাব্যতা (Probability) #Probashi Kallyan Bank #এক্সিকিউটিভ অফিসার (সাধারণ) ১৮.১০.২০১৯

Related Questions

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
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একজন চাকরিজীবীর আয় ও ব্যয়ের অনুপার ২০ঃ ১৫ হলে, তার মাসিক সঞ্চয় আয়ের শতকরা কত অংশ?
A ৩০%
B ১৫%
C ২০%
D ২৫%
একটি ট্রান্সফরমারের প্রাইমারি ও সেকেন্ডারি তারের ঘূর্ণনের অনুপাত 20ঃ 1 এবং সেকেন্ডারিতে 20 omega রোধ লাগানো আছে। যদি প্রাইমারিতে 220 V প্রয়োগ করা হয় তাহলে এর মধ্যে বিদ্যুৎ প্রবাহ হবে-
A 0.55 A
B 27.5 mA
C 27.5 A
D 5.5 mA
A box contains 21 balls numbered 1 to 21 . A ball numbered 1 to 21 . A ball is drawn and then another ball is brawn without replacement . What is the probability that both balls are even numbered?
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