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Took a while to understand the situation. Basically each day she attends 2 trainings, but on the last day it could be 1 or 2 trainings. Question at the end of the 3rd day how many trainings left?

1. 6 days so total could be 12 (6*2) or 11 (5*2) +1)). No Good since two options for how many trainings left after day 3.
2. 11 total so (5*2) +1). This tells us how many left. Sufficient.

Answer B
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Hello,
Please correct me if I am wrong, does
“ (1) The sequence of training sessions Sofia will attend will last 6 days ”
This imply that the session will last 6 days but it is not necessarily true that she will attend all 6?

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ofia will attend a sequence of daily training sessions for her job. On the last day of her training sessions she will attend either 1 session or 2 sessions. On each of the other days of her training sessions she will attend exactly 2 sessions. At the end of her third day of attending training sessions, how many sessions will Sofia have left to attend?

(1) The sequence of training sessions Sofia will attend will last 6 days.

(2) There are a total of 11 training sessions in the sequence of training sessions Sofia will attend.

This one is very easy.

Training sessions :-

Day1 Day2 Day3 Day4 Day5 Day6 ......

2 2 2 2 2 2/1

From statement 1 , we are not sure about the no. of sessions to atteneded on the last day i.e 6th day . Could be 1 or 2.

Statement 2 :-

2 , 2,2, (2,2,1) as the total no. of sessions is fixed i.e 11.

So he is left with 5 sessions. B is our ans.

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Given:
• Sofia attends 2 sessions per day on all days except the last day.
• On the last day, she attends either 1 session or 2 sessions.

To Find: The number of remaining sessions after 3 days of training.

Statement 1: The training lasts for 6 days.
• First 5 days: Since each of the first 5 days has exactly 2 sessions, these contribute: 5 × 2 = 10 sessions.
• Last day: She could attend either 1 or 2 sessions, meaning total sessions could be 11 or 12.
• After 3 days, she has already attended: 3 × 2 = 6 sessions.
• Remaining sessions = (11 or 12) – 6 = 5 or 6 sessions

Statement 1 alone is insufficient.

Statement 2: There are 11 total sessions.
• 11 sessions can only be done in more than 5 days. So, we are sure that she does 2 sessions each day for the first 3 days.
• After 3 days, she has attended: 3 × 2 = 6 sessions.
• Remaining sessions: 11 – 6 = 5

Statement 2 alone is sufficient.

Correct Answer: B
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