Question

Ans pls it's tooo urgent​

Answer 1

Step-by-step explanation:

Total marks scored = 65

Each correct answer gets 5 marks

Number of correct answer = 15

Total marks due to correct answer = 15×5 = 75

Marks lost due to incorrect answers = 75-65 =10

Lost marks of each incorrect answer = 2

So, number of incorrect answers = 10/2 = 5

Number of incorrect answers = 5

Plz mark brainliest..

Answer 2

Given :

$\sf \: In \: a \: test \: +5 \: marks \: are \: given \: for \: a \: Correct \: Answer.$

$\sf \: And \: -2 \: marks \: are \: given \: for \: a \: Wrong \: Answer.$

$\sf \: Rosa \: attempted \: all \: the \: questions \: and \: she \: scored \: (+65) \: marks$

$\sf \: though\: she \: got \: 15 \: correct \:answers.$

To Find :

$\sf \: We \: need \: to \: find \: that \: how \: many \: incorrect \: answers \: did \: she \: get.$

So, Let's Start :

$\sf \:Let \: the \: incorrect \: answers \: be \: X.$

$\sf \longrightarrow X \: \times \: (-2) \: + \: 15 (5) \: = 65$

$\sf \longrightarrow-2 X \: + \: 75 = \: 65$

$\sf \longrightarrow2 X \: = \: 75 \: - \: 65$

$\sf \longrightarrow2 X \: = \: 10$

$\boxed {\mathrm {X \: = \: 5}}$

$\boxed {\mathrm {So, \: number \: of \: incorrect \: answers \: = \: 5}}$

MORE TO KNOW ↴

• An integer, is also called a "round number" or a “whole number.
• Integers can be Positive or negative number.
• It does not include decimal parts or fractions.

SOME MORE INFORMATION ↴

• The integer was introduced in the year 1563 when Arbermouth Holst was busy with his bunnies and elephants experiment.