Q1. The price of the stock decreases Rs. 45 per day for four consecutive days. What
was the total change in value of the stock over 4 day period?
Q2. In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer.
a. Radhika answered all the questions and scored 30 marks and get 10 correct
answers
b. Jay also answered all the questions and scored (-12) marks though he got 4
correct answers. How many incorrect answers had they attempted?
Note : This is a topic on integers
Answers
Answered by
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Answer-1
Decrease in given stock price daily = 45 rs. (Given)
Number of days = 4 (Given)
Let the price of stock be = x
The price of a stock decreases by Rs.45 per day.
So, for four days, the value of the stock will fall by = 45 × 4 = 180
or
After 4 consecutive day price of stock = x-180
net change = current price - actual price
= x- 180 - x
= -180 rupees
Negative sign depicts the decrease in price.
Thus, after four consecutive days stock price will decrease by 180 rupees.
Answer-2
So, marks given for 10 correct answers
= 5 X 10 = 50
Radhika's score = 30
Marks obtained for incorrect answer
= 30- 50 = -20
Marks given for one incorrect answer
= (-2)
Therefore, number of incorrect answers
= (−20)÷(−2)=10
b] 4 correct answer= 20 marks
total marks = -12
marks lost due to incorrect answer= -12-20=-32
total no.of incorrect answer = -32/2=16
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