Question

the table shows the main dishes served each day at a cafeteria.

monday	hamburger, salad, pizza
tuesday	hamburger, stir fry, pizza
wednesday	fish and chips, stir fry, salad
thursday	stir fry, salad, tacos
friday	fish and chips, tacos, pizza

suppose you know that joshua has a salad and nora has stir fry. is that enough information to determine what day it is? if not, what other piece of information can help you

choose the correct answer below.

○ a. yes. there is enough information. it is friday.
○ b. no. there is not enough information. you also need to know if someone has fish and chips or tacos.
○ c. yes. there is enough information. it is thursday
○ d. yes. there is enough information. it is monday.
○ e. no. there is not enough information. you also need to know if someone has fish and chips or pizza.
○ f. yes. there is enough information. it is wednesday.
○ g. yes. there is enough information. it is tuesday.
○ h. no. there is not enough information. you also need to know if someone has pizza or tacos.

Explanation:

1. First, list the days with both salad and stir fry:

• Monday: hamburger, salad, pizza (no stir fry)
• Tuesday: hamburger, stir fry, pizza (no salad)
• Wednesday: fish and chips, stir fry, salad (has both)
• Thursday: stir fry, salad, tacos (has both)
• Friday: fish and chips, tacos, pizza (no salad or stir fry)

So days with both salad and stir fry are Wednesday and Thursday.

1. Now, to distinguish between Wednesday and Thursday, we need another dish. Wednesday has fish and chips, Thursday has tacos. So we need to know if someone has fish and chips or tacos.

Answer:

B. No. There is not enough information. You also need to know if someone has fish and chips or tacos.