Bunuel wrote:
\( n_1, \ n_2, \ n_3, \ n_4, \ n_5, \ n_6, \n_7\)
Iris delivered newspapers for 7 consecutive weeks. In the sequence above, n; represents the number of newspapers that Iris delivered in the\(i_{th}\) week for\( 1 ≤ i ≤7\) . For each week after the first, did Iris deliver more newspapers in that week than in the preceding week?
(1)\( n_1 <n_3 <n_5 <n_7\)
(2)\( n_2 <n_4 <n_6 <n_7\)
We can use a number line to solve this question.
Statement1
(1)\( n_1 <n_3 <n_5 <n_7\)
While we know the relative positions of four of the numbers, we don't know at what positions the other numbers are places on the number line.
Case 1(a) - Each of the remaining numbers (n2, n4, and n6) is lower than the succeeding numbers. If that was the case, the response to the question - For each week after the first, did Iris deliver more newspapers in that week than in the preceding week? - Yes !
Case 1(b) - Not all of the remaining numbers (n2, n4, and n6) are less than the succeeding numbers.
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Statistics : Posted by gmatophobia • on 11 Aug 2023, 05:00 • Replies 1 • Views 106