[Video] Q30: According to the table, which of the following pairs of base percentages in sea urchin dna provides evidence in support of the answer to the previous question?

Explanation for Question 30 From the Reading Section on the Official Sat Practice Test 1

Okay. So for number 30, it says, according to the table, which of the 2 following pairs of base percentages and sea urchin DNA provides 3 evidence in support of the airs in previous questions, the previous question was saying 4 that one and four are similar and two and three are similar. 5 So we're going to look to see urgent. Do you know? And we see 6 32 and 32 or 17 and 17. 7 So either the answer is going to be 17 and 17 because those two 8 are similar or the answers would be 32 and 32, 9 because those two are similar. We're not going to have 32 and 17 as 10 the answer or anything like that. Um, 11 okay. And the only one we have here that matches this is 17 and 12 17, the letter, a everything else, they're very different from each other. 13 Do you see that the ones that are going to base together and pair 14 together are the ones that are similar 17 and 17 or 32 and 32. 15 Now B, C and D are all 17 and 32, 16 which doesn't make any sense. You can't have a 17 pair of the 32. 17 Okay. So that's how you get the answer for that one.