Question 22 (OR 1st question) - CBSE Class 10 Sample Paper for 2020 Boards - Maths Basic - Solutions of Sample Papers for Class 10 Boards

Last updated at April 16, 2024 by Teachoo

A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random from the lot. What is the probability that the bulb is good.

Question 22 (OR 1st question) - CBSE Class 10 Sample Paper for 2020 Bo

Note : This is similar to Ex 15.1, 17 of NCERT – Chapter 15 Class 10

Check the answer here https://www.teachoo.com/1981/563/Ex-15.1--17---A-lot-of-20-bulbs-contain-4-defective-ones/category/Ex-15.1/

Transcript

Question 22 (OR 1st question) A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random from the lot. What is the probability that the bulb is good. Given Total number of bulbs = 25 Total number of defective bulbs = 5 So, Total Number of good bulbs = 25 – 5 = 20 Now, P (getting a good bulb) = (𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑔𝑜𝑜𝑑 𝑏𝑢𝑙𝑏𝑠)/(𝑇𝑜𝑡𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑏𝑢𝑙𝑏𝑠) = 20/25 = 𝟒/𝟓

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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