Question

Q.3. a class test 4 marks were awarded for every correct answer, 2 marks are deducted for

every incorrect answer and no marks are given for not attempting question. Ravi scored 20

marks. If he has got 8 correct answers, how many questions has he attempted incorrectly?​

Answer 1

(i) Mohan get 4 correct answer = 4\times5\ =20\4×5 =20

He gets 6 incorrect answer = 6\times\left(-2\ \right)=\ -126×(−2 )= −12

Total score = 20-12\ =\ 8\20−12 = 8

Thus, mohan get 8 marks in the class test.

(ii) For 5 correct answer = 5\times5\ =\ 255×5 = 25

For 5 incorrect answer = 5\times\left(-2\right)=\ -105×(−2)= −10

Total score = 25-10\ =\ 1525−10 = 15

(iii) Heena get 2 correct answer = 5\times2=\ 105×2= 10

Heena get 5 incorrect = 5\times\left(-2\right)\ =\ -105×(−2) = −10

Total score = 10\ -10\ =\ 010 −10 = 0

Thus, total score of heena is zero.

Answer 2

Answer:

$\huge\blue{ \mid{ \underline{ \overline{ \tt ✠卂ɴˢᴡєʳ✠ }} \mid}}$

• Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

$\huge\purple\sf{\fbox{\fbox \purple{➳ᴹᴿ᭄ \: ąཞყąŋ}}}$