## SAT - Math - Ratio and Proportion

Aryan Sharma
4 months ago
**Math** |
**Ratio and Proportion**

### Wrong Options (more)

Question 6 of SAT Math D113 has wrong options. Where do I report this?

**The amount of money a teacher earns is directly proportional to the number of students he teaches. The teacher earns $ 250 when he teaches 4 students. How much will he earn if he teaches 15 students?**

Options:

A. |
500 |

B. |
1025 |

C. |
1175 |

D. |
1125 |

### Solution

**earning ex no of students**

** â‡¨ earning = constant ****×**** no. of students**

** â‡¨ 250 = constant × 4**

** â‡¨ Constant = **** = 75**

** So, for 15 students earning = 75 × 15 = $ 1125 **

For this solution, the teacher should earn $300 and not $250.

LEAP Administrator
8 months ago
**Math** |
**Ratio and Proportion**

### A hospital stores one type of medicine in 2-decagram containers (more)

A hospital stores one type of medicine in 2-decagram containers. Based on the information given in the box above, how many 1-milligram doses are there in one 2-decagram container?

1 decagram = 10 gram = 10000 miligram

2 decagram = 20000 miligram

total number of 1 miligram doses = 20000

LEAP Administrator
8 months ago
**Math** |
**Ratio and Proportion**

### If a/b=2, what is the value of 4b/a? (more)

If a/b=2, what is the value of 4b/a?

LEAP Administrator
9 months ago
**Math** |
**Ratio and Proportion**

### If y=kx, where k is a constant, and y=24 when x = 6, what is the value of y when x=5? (more)

If y=kx, where k is a constant, and y=24 when x = 6, what is the value of y when x=5?

LEAP Administrator
9 months ago
**Math** |
**Ratio and Proportion**

### The value of x and y in the table above are related so that (y-1) is directly proportional to (x+1). What is the value of b+a? (more)

x | 0 | 1 | 2 |

y | 10 | a | b |

The value of x and y in the table above are related so that (y-1) is directly proportional to (x 1). What is the value of b a?

Given (y-1) = k (x+1)

from first column

10-1 = k(0+1)

k = 9

from second column

a -1 = 9*(1+1) = 18

a = 19

from third column

b-1 = 9*(2+1) = 27

b = 28

a + b = 28 + 18 = 46