Reasoning · Grade 2-2 Tables and Graphs

Problem

Complete and interpret a data table

A chart pairs each of 28 students with the one fruit they like best - apple, yellow apple, persimmon, grapes, tangerine, banana or cherry. Counting per fruit fills a table whose total must come to 28. Five claims are offered: (A) which fruit Eunju likes, (B) how many students like grapes, (C) which fruit the most students like, (D) who likes the same fruit as Jihyeon, (E) whether more boys than girls like bananas. Fill the table, then pick the claims the table alone settles.
Your answer
How to solve
Strategy Make a Systematic List — Counting categories from raw data is exactly a 'make a systematic list / tally' task: go fruit by fruit so nobody is missed or double-counted. For part (2) I change the representation in my head from the raw name-by-fruit data to the summary frequency table and ask what information survives that re-organizing - the table keeps the per-fruit counts but loses individual names and gender, which decides each statement.
1STEP 1

Tally each fruit one category at a time

Sweeping one fruit at a time gives 3, 5, 2, 5, 2, 4, 7.

3 + 5 + 2 + 5 + 2 + 4 + 7 = 28
2STEP 2

Fill the table and check the Total

The seven counts add to 28, so nobody was missed.

3+5+2+5+2+4+7 = 28
3STEP 3

Decide what the frequency table alone can tell you

Only counts survive, so just (B) and (C) are knowable.

Answer
apple 3, yellow-apple 5, persimmon 2, grapes 5, tangerine 2, banana 4, cherry 7, total 28 / knowable (B), (C)
The seven counts add to exactly 28, the stated class size, so the table is consistent. For part (2), (B) and (C) are pure 'how many / which is most' questions that a count table is built to answer, while (A), (D), (E) ask about a specific student or about gender - information the table does not contain - so rejecting those three is sensible.
Takeaway

Count each fruit carefully so everything adds to 28 - then remember a count table tells you 'how many' and 'which is most,' but never 'who' or 'boy or girl.'

  • Tally each fruit one category at a time
  • Fill the table and check the Total
  • Decide what the frequency table alone can tell you