A probability problem by Tharun Aju

Probability Level 2

From which to which step is there a problem in the given imaage?

Solution with most upvotes is declared winner!

Step 4 to 5 Step 3 to 4 Step 2 to 3 Step 1 to 2

Tharun Aju by Tharun Aju , 16, India

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2 solutions

Ram Mohith
Oct 21, 2018

Given in the first step the a = b ⟹ a − b = 0 a = b \implies \boxed{a - b = 0} . In step 4 to step 5 we are cancelling ( a − b ) (a - b) on both sides which is equal to zero. As division by 0 is not allowed step 4 to 5 is not a valid step.

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Tharun Aju
Oct 21, 2018

Let's keep a and b both as five Step 1,, 5=5. (no probs). Step 2,, 25=25 (no probs). Step 3,, 25-25=25-25 (no probs). Step 4,, (5+5)(0)=5*0(no probs). Step 5,, now here's the problem. Picture below explains it. Therfore,Step 4 to 5 will be the correct option for the question

PS please upvote my comment guys!

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