Karen's penny bank is 1/3 full. after she removes 240 pennies, it is 1/9 full. how many pennies can karen's bank hold?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Select the two pairs of figures that are similar.