1. Profile photo of akshit says

    in question (B) you have given the answer as 0.977 but i am getting it as 95.2

    (7*187000)-(2800*420)=133000 (as you stated in the answer

    *?[(7*1,400,000)-(2800*2800)]-[(7*26550)-(420*420)]=1396.6 but you wrote 136096

    this is leading to a mistake in my calculations,please confirm


    • avatar says

      I am actually getting .718. John, I think there is an error in your working in the revision notes. You have (9,800,000-7,840,000) as 196,000, when it should be 1,960,000. Correct me if I’m wrong.

  2. Profile photo of Erica says

    Sir, the question in the revision kit for this chapter..
    a) why is the answer : y = 32.84 – 0.0679x and not : y = 32.84 + 0.0679x? for i got a positive answer for b.

    Other than that. how do we know how many decimal places should we use in the exams as the b produces the answer of 0.067857142? Same goes to question c) as it results to 0.9554529 (95.5% in percentage) Please help. I’m very confused.

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