Express 0.03785 in standard form correct to 3 significant figures.
3 × 10−2
3.78 × 10−2
3.79 × 10−2
3.79 × 10−1
3.78 × 10−2
Correct answer is C
No explanation has been provided for this answer.
The first term of a G.P is 7. Find its 4th term, if its common ratio is 3.
567
280
189
63
21
Correct answer is C
No explanation has been provided for this answer.
1017
717
2051
317
151
Correct answer is B
No of women wearing both purple and white shoes = 21 + 9
= 30 women.
No of women wearing neither purple nor white shoes = 51 - 30
= 21 women
∴ Probability of picking a woman wearing neither purple nor white shoes
= \frac{21}{51}
= \frac{7}{17}.