Answer: She must answer 21 questions.
Step-by-step explanation:
GIven: Percent of question she need to answer = 30%
i.e. Total questions she must answer = 30% of (Total questions in the packet)
Since there are 70 questions in the packet, then the number of question she must answer will be
30% of 70
= 0.30 x 70 [30%=0.30]
= 21
Hence, she must answer 21 questions.
