Let M be the number of questions answered correctly by Saruchi.
⇒75 = (+5)×(M) - 2×10
⇒75= 5M-20
⇒5M = 75+20
⇒5M = 95
⇒M = 19
correct answer = 19
total question = 29
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Let M be the number of questions answered correctly by Saruchi.
⇒75 = (+5)×(M) - 2×10
⇒75= 5M-20
⇒5M = 75+20
⇒5M = 95
⇒M = 19
∴The number of questions answered correctly by Saruchi are 19.
correct answer = 19
total question = 29