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There Are Four Machines And It Is Known That Exactly Two Of Them Are Faulty They Are Tested One By One In A Random Order Till Both The Faulty

1) 1/3 2) 1/6 3) 1/2 4) 1/4 Solution: Option (2) 1/6 Total number of machines = 4 The required... View Article

A Rifleman Is Firing At A Distant Target And Has Only 10 Chance Of Hitting It The Minimum Number Of Round He Must Fire In Order To Have 50

1) 7 2) 8 3) 9 4) 6 Solution: Option (1) 7 Given that the probability of hitting in one... View Article

Odds 8 To 5 Against A Person Who Is 40 Years Old Living Till He Is 70 And 4 To 3 Against Another Person Now 50 Till He Will Be Living 80

1) 59/91 2) 44/91 3) 51/91 4) 32/91 Solution: Option (2) 44/91 Let A and B be the two persons.... View Article

An Unbiased Coin Is Tossed If The Result Is A Head A Pair Of Unbiased Dice Is Rolled And The Number Obtained By Adding The Numbers On

1) 0.24 2) 0.244 3) 0.024 4) None of these Solution: Option (2) 0.224. The probability that the number is... View Article

If Pa 03 Pb 04 Pc 08 Pab 008 Pac 028 Pabc 009 Pa B C Gte 075 And Pbc X Then

1) 0.23 ≤ x ≤ 0.48 2) 0.32 ≤ x ≤ 0.84 3) 0.25 ≤ x ≤ 0.73 4) None... View Article

If 13p3 1p4 And 12p2 Are The Probabilities Of Three Mutually Exclusive Events Then The Set Of Values Of P Is

1) ⅓ ≤p ≤ ½ 2) ½ < p< 1/2 3) ½ ≤p ≤2/3 4) ½ <p< ⅔ Solution: Option... View Article

A Bag Contains A White And B Black Balls A And B Alternately Draw A Ball Probability Of A Winning The Game Is Three Times That Of B The Ratio Ab

1) 1:1 2) 1:2 3) 2:1 4) None of these Solution: Option (3) 2:1 Let the event of choosing the... View Article

If E And F Are Events With Pe Lte Pf And Pe Intersection F Gt 0 Then

1) Occurrence of E ⇒ Occurrence of F 2) Occurrence of F ⇒ Occurrence of E 3) Non-occurrence of E... View Article

For The Binomial Distribution P Qn Whose Mean Is 20 And Variance Is 16 Pair N P Is

1) (100, ⅕) 2) (100, ⅖) 3) (50, ⅕) 4) (50, ⅖) Solution: Option (1) (100, ⅕) Given that, Mean... View Article

A Fair Coin Is Tossed N And A Number Of Times If The Probability Of Having At Least One Head Is More Than 90 Then N Is Greater Than Or Equal To

1) 2 2) 3 3) 4 4) 5 Solution: Option (3) 4 The probability of having at least one head... View Article

06 Jan 2021: PIB Summary & Analysis

January 6th, 2021, PIB:- Download PDF Here TABLE OF CONTENTS 1. MoC between India and Japan 2. World of Coriander... View Article

07 Jan 2021: UPSC Exam Comprehensive News Analysis

7 Jan 2021 CNA:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related B. GS 2 Related HEALTH 1.... View Article

06 Jan 2021: The Hindu Analysis

UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 06th January 2021. Important news and... View Article

When Light Enters From Air To Water Then Its Frequency A Increases And Speed Decreases B Is Same

When light enters from air to water, since energy remains the same, its frequency also remains the same. But the... View Article

4nh3g 5o2g 4nog 6h2og The Following Reaction Is An Example Of A I Displacement Reaction Ii Combination Reaction Iii Redox Reaction Iv Neutralisation Reaction

Answer: (i) displacement reaction (iii) redox reaction 4NH3(g) + 5O2(g)→ 4NO(g) + 6H2O(g) Oxygen displaces the hydrogen of ammonia. Hence,... View Article

One Card Is Drawn From A Pack Of 52cards Each Of The 52 Cards Being Equally Likely To Be Drawn Find The Probability That The Card Is Drawn Is

Total of cards = n(S) = 52 a)n(Ace) = 4 P(Ace) = 4/52 = 1/13 b) n(Red) = 26 P(Red)... View Article

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