Advertisements
Advertisements
प्रश्न
A speaks truth in 75% cases and B in 80% of the cases. In v1hat percentage of cases are they likely to contradict each other. narrating the same incident?
पर्याय
5%
15%
35%
45%
Advertisements
उत्तर
35%
Explanation:
A Speak truth 75% i.e. P(A) =`3/4` `"P"(overline ("A")) =1/4`
Similarly 80% i.e. `"P"("B") =4/5 "P"(overline ("B") )=1/5`
While contradicting the narration
Probability =`"P"("A") ="P" (overline("B"))+"P"(overline("A"))"PB"`
`=3/4xx1/5+1/4xx4/5=7/20` or `7/20xx100=35%`
APPEARS IN
संबंधित प्रश्न
The Municipality of a town increases water tax by 20% and water consumption decreased by 20%. Then the percentage of increase or decrease in the monthly expenditure is:
Find 12% of 5000
The length of a square is increased by 15% and breadth decreased by 15%. The area of the rectangle so formed is
In an examination, a student who secured 25% of the maximum marks fails by 60 marks but another candidate who secures 45% of the maximum marks gets 10 marks more than required passing marks. The maximum number of marks is
Divya purchased 6 mangoes, 10 oranges and 5 apples for a certain amount. With 40% less amount of Anu could purchase 3 mangoes, 5 oranges, and 4 apples. What percentage of the total amount did Divya spend on apples?
Rajeev buys good worth ₹ 6650. He gets a rebate of 6% on it. After getting the rebate, he pays sales tax @ 10%. Find the amount he will have to pay for the goods.
What percentage of numbers from 1 to 70 have 1 or 9 in the unit's digit?
A batsman scored 110 runs which included 3 boundaries and 8 sixes. What percent of his total score did he make by running between the wickets?
In a factory, 60% of the workers are above 30 yr and of these 75 % are males and the rest are females. If there are 1350 male workers above 30 yr, the total number of workers in the factory is
The population of a city is 2,96,000 out which 1,66,000 are males. 50% population is literate. If 70% males are literate, then the number of women who are literate is
